diff --git a/opennurbs_font.cpp b/opennurbs_font.cpp
index 4619dcb4..fddd717a 100644
--- a/opennurbs_font.cpp
+++ b/opennurbs_font.cpp
@@ -8898,7 +8898,7 @@ const ON_wString ON_Font::FamilyNameFromDirtyName(
     const wchar_t* prev_clean_family_name = nullptr;
     for (size_t i = 0; i < installed_count; i++)
     {
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
       const ON_Font* font = installed_fonts[(int)i];
 #else
       const ON_Font* font = installed_fonts[i];
@@ -8961,7 +8961,7 @@ const ON_wString ON_Font::FamilyNameFromDirtyName(
       InternalHashToName candidate;
       for (size_t i = 0; i < count0; i++)
       {
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
         InternalHashToName e = a[(int)i];
 #else
         InternalHashToName e = a[i];
diff --git a/opennurbs_locale.cpp b/opennurbs_locale.cpp
index 45c46a5b..0868c9ae 100644
--- a/opennurbs_locale.cpp
+++ b/opennurbs_locale.cpp
@@ -35,7 +35,7 @@ static ON_CRT_locale_t ON_CRT_C_locale()
     ON_C_locale = _create_locale(LC_ALL, "C");
 #elif defined(ON_RUNTIME_APPLE)
     ON_C_locale = _c_locale;
-#elif defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#elif defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
     ON_C_locale = 0;
 #else
     ON_C_locale = _create_locale(category, locale);
@@ -104,7 +104,7 @@ static ON_CRT_locale_t ON_CRT_create_locale_ALL( const char * locale )
     }
   }
   return newlocale(LC_ALL_MASK, apple_name, ON_CRT_C_locale() );
-#elif defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#elif defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   return 0;
 #else
   return _create_locale(category, locale);
@@ -1344,7 +1344,7 @@ class ON_CRT_LOCALE
   static bool Validate_sprintf_l()
   {
 #if defined(ON_COMPILER_CLANG) || defined(ON_COMPILER_GNU)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
     // Test formatted printing
     char buffer[64] = { 0 };
     // Testing C-runtime - do not using ON_String::FormatIntoBuffer
@@ -1369,7 +1369,7 @@ class ON_CRT_LOCALE
   static bool Validate_sprintf_s_l()
   {
 #if defined(ON_COMPILER_CLANG) || defined(ON_COMPILER_GNU)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
     // Test formatted printing
     char buffer[64] = { 0 };
     size_t buffer_capacity = (sizeof(buffer) / sizeof(buffer[0])) - 1;
@@ -1423,7 +1423,7 @@ class ON_CRT_LOCALE
   static bool Validate_sscanf_l()
   {
 #if defined(ON_COMPILER_CLANG) || defined(ON_COMPILER_GNU)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
     // Test formatted scanning
     double a = ON_UNSET_VALUE;
     // Testing C-runtime - do not using ON_String::Scan
@@ -1448,7 +1448,7 @@ class ON_CRT_LOCALE
   static bool Validate_sscanf_s_l()
   {
 #if defined(ON_COMPILER_CLANG) || defined(ON_COMPILER_GNU)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
     // Test formatted scanning
     double a = ON_UNSET_VALUE;
     // Testing C-runtime - do not using ON_String::Scan
diff --git a/opennurbs_polyline.cpp b/opennurbs_polyline.cpp
index 87e9eff4..1d37c9ec 100644
--- a/opennurbs_polyline.cpp
+++ b/opennurbs_polyline.cpp
@@ -453,7 +453,7 @@ bool ON_IsConvexPolyline(
   maxN = maxN.UnitVector();
   for (size_t i = 0; i < point_count; ++i)
   {
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
     double d = maxN * C[(unsigned int)i];
 #else
     double d = maxN * C[i];
diff --git a/opennurbs_string_format.cpp b/opennurbs_string_format.cpp
index 304b351e..5fa190c5 100644
--- a/opennurbs_string_format.cpp
+++ b/opennurbs_string_format.cpp
@@ -807,7 +807,7 @@ int ON_String::FormatVargsIntoBuffer(
   // CLang modifies args so a copy is required
   va_list args_copy;
   va_copy (args_copy, args);
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   int len = vsnprintf(buffer, buffer_capacity, format, args_copy);
 #else
   int len = vsnprintf_l(buffer, buffer_capacity, ON_Locale::Ordinal.NumericLocalePtr(), format, args_copy);
@@ -859,7 +859,7 @@ int ON_String::FormatVargsOutputCount(
   va_list args_copy;
   va_copy (args_copy, args);
 
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   int len = vsnprintf(nullptr, 0, format, args_copy);
 #else
   int len = vsnprintf_l(nullptr, 0, ON_Locale::Ordinal.NumericLocalePtr(), format, args_copy);
diff --git a/opennurbs_string_scan.cpp b/opennurbs_string_scan.cpp
index 34df9069..c19ebe66 100644
--- a/opennurbs_string_scan.cpp
+++ b/opennurbs_string_scan.cpp
@@ -86,7 +86,7 @@ int ON_String::ScanBufferVargs(
   )
 {
 #if defined(ON_COMPILER_CLANG) || defined(ON_RUNTIME_LINUX)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   if (nullptr == buffer || nullptr == format)
     return -1;
   return vsscanf(buffer, format, args);
@@ -399,7 +399,7 @@ const char* ON_String::ToNumber(
 
   double x = value_on_failure;
 #if defined(ON_COMPILER_CLANG) || defined(ON_RUNTIME_LINUX)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   if (1 == sscanf(local_buffer, "%lg", &x))
   {
     *value = x;
@@ -661,7 +661,7 @@ const wchar_t* ON_wString::ToNumber(
 
   double x = value_on_failure;
 #if defined(ON_COMPILER_CLANG) || defined(ON_RUNTIME_LINUX)
-#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_ANDROID) || defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   if (1 == sscanf(local_buffer, "%lg", &x))
   {
     *value = x;
diff --git a/opennurbs_system.h b/opennurbs_system.h
index 504fea2f..23688479 100644
--- a/opennurbs_system.h
+++ b/opennurbs_system.h
@@ -25,8 +25,7 @@
 #if !defined(OPENNURBS_SYSTEM_INC_)
 #define OPENNURBS_SYSTEM_INC_
 
-
-
+#define ON_SIZEOF_WCHAR_T 4
 
 
 #define OPENNURBS_PP2STR_HELPER(s) #s
@@ -434,7 +433,7 @@ typedef ON__UINT32 wchar_t;
 #if defined(ON_COMPILER_CLANG) && defined(ON_RUNTIME_APPLE)
 #include <malloc/malloc.h>
 #else
-#include <malloc.h>
+#include <stdlib.h>
 #endif
 #pragma ON_PRAGMA_WARNING_AFTER_DIRTY_INCLUDE
 
diff --git a/opennurbs_uuid.cpp b/opennurbs_uuid.cpp
index 6f83a8a7..16df0c82 100644
--- a/opennurbs_uuid.cpp
+++ b/opennurbs_uuid.cpp
@@ -177,7 +177,7 @@ bool ON_CreateUuid( ON_UUID& new_uuid )
                                        // identifies the user and some
                                        // customers may object.
   return true;
-#elif defined(ON_COMPILER_CLANG)
+#elif defined(ON_COMPILER_CLANG) && !defined(__FreeBSD__)
   // Header: #include <uuid/uuid.h>
   if ( ON::endian::little_endian == ON::Endian() )
   {
@@ -224,7 +224,7 @@ bool ON_CreateUuid( ON_UUID& new_uuid )
   return true;
 #else
 
-#if defined(ON_RUNTIME_LINUX)
+#if defined(ON_RUNTIME_LINUX) || defined(__FreeBSD__)
   uuid_generate((unsigned char*)&new_uuid);
   return true;
 #else