diff --git a/Source/Engine/Platform/Win32/Win32StringUtils.cpp b/Source/Engine/Platform/Win32/Win32StringUtils.cpp
index 2a9bcf174..ea1eb8fe9 100644
--- a/Source/Engine/Platform/Win32/Win32StringUtils.cpp
+++ b/Source/Engine/Platform/Win32/Win32StringUtils.cpp
@@ -182,7 +182,7 @@ const char* StringUtils::Find(const char* str, const char* toFind)
 void StringUtils::ConvertANSI2UTF16(const char* from, Char* to, int32 fromLength, int32& toLength)
 {
     if (fromLength)
-        toLength = mbstowcs(to, from, fromLength);
+        toLength = (int32)mbstowcs(to, from, fromLength);
     else
         toLength = 0;
 }