diff --git a/configure.ac b/configure.ac
index b46115dd53bd796471cea2d5209862fd41c50b00..1ec1665237bf9583fa346b772f6e1dae44fb6080 100644
--- a/configure.ac
+++ b/configure.ac
@@ -52,7 +52,7 @@ DVDREAD_LT_REVISION=0
 
 AC_SUBST([DVDREAD_LTVERSION], [$DVDREAD_LT_CURRENT:$DVDREAD_LT_REVISION:$DVDREAD_LT_AGE])
 
-AC_PROG_CC
+AC_PROG_CC_C99
 
 AC_CHECK_HEADERS_ONCE([sys/param.h limits.h dlfcn.h])