diff --git a/configure b/configure
index 9e4e7e1271..1616e006d3 100755
--- a/configure
+++ b/configure
@@ -2786,7 +2786,8 @@ else
     typedef signed int  int_fast32_t;
     typedef unsigned char uint_fast8_t;
     typedef unsigned int  uint_fast16_t;
-    typedef unsigned int  uint_fast32_t;'
+    typedef unsigned int  uint_fast32_t;
+    typedef unsigned long long uint_fast64_t;'
 fi
 echores "$_fast_inttypes"