diff --git a/src/Common/Dlgcode.c b/src/Common/Dlgcode.c
index 63a0f68c..244d9a4f 100644
--- a/src/Common/Dlgcode.c
+++ b/src/Common/Dlgcode.c
@@ -11228,7 +11228,7 @@ BOOL HasTranslatedDocumentation(const char* language)
 {
     // hardcoded list of languages for which a translated documentation exists
     const char* supportedLanguages[] = { "en", "ru", "zh-cn"};
-    for (int i = 0; i < sizeof(supportedLanguages) / sizeof(supportedLanguages[0]); i++)
+    for (size_t i = 0; i < sizeof(supportedLanguages) / sizeof(supportedLanguages[0]); i++)
     {
         if (strcmp(language, supportedLanguages[i]) == 0)
             return TRUE;
diff --git a/src/Main/GraphicUserInterface.cpp b/src/Main/GraphicUserInterface.cpp
index f9f4a321..3adeb54a 100644
--- a/src/Main/GraphicUserInterface.cpp
+++ b/src/Main/GraphicUserInterface.cpp
@@ -73,7 +73,7 @@ namespace VeraCrypt
 	{
 		// hardcoded list of languages for which a translated documentation exists
 		const char* supportedLanguages[] = { "en", "ru", "zh-cn"};
-		for (int i = 0; i < sizeof(supportedLanguages) / sizeof(supportedLanguages[0]); i++)
+		for (size_t i = 0; i < sizeof(supportedLanguages) / sizeof(supportedLanguages[0]); i++)
 		{
 			if (strcmp(language, supportedLanguages[i]) == 0)
 				return TRUE;