diff --git a/configure.ac b/configure.ac
index 5c49040..2d4e90d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -53,6 +53,9 @@ AC_DEFINE_UNQUOTED([GITREVISION],["${GITREVISION}"],
 # Checks for programs
 
 AC_PROG_CC
+AC_PROG_CC_STDC
+AS_IF([test "x${ac_cv_prog_cc_stdc}" = xno],
+      [AC_MSG_WARN([Unable to engage Standard C (C99) option])],)
 AC_PROG_INSTALL
 
 # Process options