diff --git a/userspace/libsinsp/filter.cpp b/userspace/libsinsp/filter.cpp
index 2e810840f3..2eae5086e2 100644
--- a/userspace/libsinsp/filter.cpp
+++ b/userspace/libsinsp/filter.cpp
@@ -1024,7 +1024,7 @@ int32_t sinsp_filter_check::get_check_id()
 }
 
 
-void sinsp_filter_check::add_filter_value(const char* str, uint32_t len, uint16_t i)
+void sinsp_filter_check::add_filter_value(const char* str, uint32_t len, uint32_t i)
 {
 
 	if (i >= m_val_storages.size())
@@ -1709,7 +1709,7 @@ void sinsp_filter_compiler::parse_check()
 			//
 			// Create the 'or' sequence
 			//
-			uint64_t num_values = 0;
+			uint32_t num_values = 0;
 			while(true)
 			{
 				// 'in' clause aware
@@ -1762,7 +1762,7 @@ void sinsp_filter_compiler::parse_check()
 			//
 			// Create the 'or' sequence
 			//
-			uint64_t num_values = 0;
+			uint32_t num_values = 0;
 			while(true)
 			{
 				// 'in' clause aware
diff --git a/userspace/libsinsp/filter_value.h b/userspace/libsinsp/filter_value.h
index 9ec5feb259..67c780b0e7 100644
--- a/userspace/libsinsp/filter_value.h
+++ b/userspace/libsinsp/filter_value.h
@@ -38,10 +38,9 @@ struct g_hash_membuf
 		return std::_Hash_impl::hash(val.first, val.second);
 #else
 		size_t hash = 5381;
-		for(uint8_t *p = val.first; p-val.first < val.second; p++)
+		for(uint8_t *p = val.first; (uint32_t)(p-val.first) < val.second; p++)
 		{
 			int c = *p;
-
 			hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
 		}
 		return hash;
diff --git a/userspace/libsinsp/filterchecks.h b/userspace/libsinsp/filterchecks.h
index b4d659c52e..be2d7f1c6b 100644
--- a/userspace/libsinsp/filterchecks.h
+++ b/userspace/libsinsp/filterchecks.h
@@ -84,7 +84,7 @@ class sinsp_filter_check
 	// If this check is used by a filter, extract the constant to compare it to
 	// Doesn't return the field length because the filtering engine can calculate it.
 	//
-	void add_filter_value(const char* str, uint32_t len, uint16_t i = 0 );
+	void add_filter_value(const char* str, uint32_t len, uint32_t i = 0 );
 	virtual void parse_filter_value(const char* str, uint32_t len, uint8_t *storage, uint32_t storage_len);
 
 	//