diff --git a/configure.ac b/configure.ac
index 209c108..df71d0a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -57,7 +57,7 @@ AC_MSG_RESULT($enable_debug)
  
 if test x"$enable_debug" = "xyes"
 then
-  CFLAGS="$CFLAGS -g -Wall -DDEBUG -pedantic"
+  CFLAGS="$CFLAGS -g -Wall -DDEBUG -pedantic -O0 -ggdb"
 fi
 AC_SUBST([DEBUG_CFLAGS])