diff --git a/project/extras.mk b/project/extras.mk
index bb8ac90..c57d93c 100644
--- a/project/extras.mk
+++ b/project/extras.mk
@@ -8,6 +8,7 @@ CFLAGS_CONFIG += -DPREFIX=\"$(PREFIX)\"
 CFLAGS_CONFIG += -DEXEC_PREFIX=\"$(EXEC_PREFIX)\"
 CFLAGS_CONFIG += -DVPATH=\"$(SOURCE_DIR)\"
 CFLAGS_CONFIG += -DPYTHONPATH=\"$(PYTHON_PATH)\"
+CFLAGS_CONFIG += -DABIFLAGS=\"\"
 
 # python's front-end utility
 LDFLAGS_DEPS    += -Wl,--as-needed