diff --git a/src/os.cpp b/src/os.cpp
index 0739ccc..ec5df09 100644
--- a/src/os.cpp
+++ b/src/os.cpp
@@ -4,6 +4,7 @@
  */
 
 #include <bx/os.h>
+#include <bx/uint32_t.h>
 
 #if BX_PLATFORM_WINDOWS || BX_PLATFORM_WINRT
 #	include <windows.h>