diff --git a/Libraries/LibC/inttypes.h b/Libraries/LibC/inttypes.h
index 76f9ef235f..b983f16699 100644
--- a/Libraries/LibC/inttypes.h
+++ b/Libraries/LibC/inttypes.h
@@ -65,3 +65,6 @@
 #define SCNdMAX __PRI64_PREFIX "d"
 #define SCNoMAX __PRI64_PREFIX "o"
 #define SCNuMAX __PRI64_PREFIX "u"
+
+#define SCNu64 __PRI64_PREFIX "u"
+#define SCNd64 __PRI64_PREFIX "d"