diff --git a/configure.ac b/configure.ac
index 8cede20..f75efd5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,7 +60,7 @@ dnl Checks for programs.
 
 AC_PROG_CC
 AM_PROG_CC_C_O
-AC_PROG_CC_STDC
+m4_version_prereq([2.70],,[AC_PROG_CC_STDC])
 AC_PROG_CPP
 AC_PROG_INSTALL