1 files changed, 2 insertions, 2 deletions
diff --git a/Makeconf b/Makeconf
index dfca7711..b6acd382 100644
--- a/Makeconf
+++ b/Makeconf
@@ -78,8 +78,8 @@ INCLUDES += -I$(..)include -I$(top_srcdir)/include
 CPPFLAGS += $(INCLUDES) \
 	     -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 \
 	    $($*-CPPFLAGS)
-CFLAGS += -std=gnu99 $(gnu89-inline-CFLAGS) -Wall -g -O3 \
-	    -fno-strict-aliasing $($*-CFLAGS)
+CFLAGS += -std=gnu99 $(gnu89-inline-CFLAGS) -Wall -Werror=old-style-definition \
+					-g -O3 -fno-strict-aliasing $($*-CFLAGS)
 
 # Include the configure-generated file of parameters.
 # This sets up variables for build tools and installation directories.