diff --git a/CMakeLists.txt b/CMakeLists.txt
index 438e6229a4..c496ad97b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -220,14 +220,17 @@ if(HAVE_STRCASECMP)
 	add_definitions(-DHAVE_STRCASECMP)
 endif()
 
-check_function_exists(strlcat HAVE_STRLCAT)
-if(HAVE_STRLCAT)
-	add_definitions(-DHAVE_STRLCAT)
-endif()
+# Emscripten's strlcat and strlcpy triggers ASAN errors
+if(NOT EMSCRIPTEN)
+	check_function_exists(strlcat HAVE_STRLCAT)
+	if(HAVE_STRLCAT)
+		add_definitions(-DHAVE_STRLCAT)
+	endif()
 
-check_function_exists(strlcpy HAVE_STRLCPY)
-if(HAVE_STRLCPY)
-	add_definitions(-DHAVE_STRLCPY)
+	check_function_exists(strlcpy HAVE_STRLCPY)
+	if(HAVE_STRLCPY)
+		add_definitions(-DHAVE_STRLCPY)
+	endif()
 endif()
 
 check_function_exists(strndup HAVE_STRNDUP)