1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 3ec89916a..7e8c7042b 100644
--- a/Makefile
+++ b/Makefile
@@ -111,6 +111,7 @@ LDFLAGS += -pg
 endif
 
 ifeq ($(ENABLE_ABC),1)
+CXXFLAGS += -DYOSYS_ENABLE_ABC
 TARGETS += yosys-abc
 endif