diff --git a/libImaging/Sgi.h b/libImaging/Sgi.h
index 4d26cc465..f75ea9225 100644
--- a/libImaging/Sgi.h
+++ b/libImaging/Sgi.h
@@ -1,4 +1,5 @@
 /* Sgi.h */
+#include <stdint.h>
 
 typedef struct {