diff --git a/gnome/configure.ac b/gnome/configure.ac
index 2fcd47a98847ca3299baa52dd243d4d036b8d659..580d75553d212ec6be4961b3afe2fc4112646236 100644
--- a/gnome/configure.ac
+++ b/gnome/configure.ac
@@ -23,7 +23,7 @@ else
 	CFLAGS="$CFLAGS -Wall -Wextra"
 fi
 
-AC_PROG_CC
+AC_PROG_CC_C99
 AM_PROG_CC_C_O dnl for per target flags, i.e. test_program_CFLAGS
 AC_PROG_INSTALL
 AC_HEADER_STDC