diff --git a/assembler/src/gen4asm.h b/assembler/src/gen4asm.h
index b61e1bd1..080cb792 100644
--- a/assembler/src/gen4asm.h
+++ b/assembler/src/gen4asm.h
@@ -26,7 +26,7 @@
  *
  */
 
-#include <sys/types.h>
+#include <inttypes.h>
 
 typedef unsigned char GLubyte;
 typedef short GLshort;