diff --git a/tools/capture-fcn-attributes.go b/tools/capture-fcn-attributes.go
index c3b64f4..b4cd240 100644
--- a/tools/capture-fcn-attributes.go
+++ b/tools/capture-fcn-attributes.go
@@ -67,7 +67,7 @@
 )
 
 const prog = `
-#include <inttypes.h>
+typedef unsigned long long uint64_t;
 typedef struct  {
   uint64_t a[512];
   uint64_t b[512];