diff --git a/ext/f2c_blas/xerbla.c b/ext/f2c_blas/xerbla.c
index b7b5623fd..7a70bd8bb 100644
--- a/ext/f2c_blas/xerbla.c
+++ b/ext/f2c_blas/xerbla.c
@@ -3,6 +3,7 @@
 extern "C" {
 #endif
 #include "f2c.h"
+#include "stdio.h"
 
 /* Subroutine */ int xerbla_(char *srname, integer *info)
 {