diff --git a/include/bx/string.h b/include/bx/string.h
index 7465ca1..358eeed 100644
--- a/include/bx/string.h
+++ b/include/bx/string.h
@@ -8,8 +8,6 @@
 
 #include "allocator.h"
 
-#include <wchar.h> // wchar_t
-
 namespace bx
 {
 	struct Units
diff --git a/src/string.cpp b/src/string.cpp
index dee6565..eadd5c8 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -10,6 +10,7 @@
 
 #if !BX_CRT_NONE
 #	include <stdio.h> // vsnprintf, vsnwprintf
+#	include <wchar.h> // vswprintf
 #endif // !BX_CRT_NONE
 
 namespace bx