diff --git a/Makefile b/Makefile
index 7f37fe6aa..06d020e68 100644
--- a/Makefile
+++ b/Makefile
@@ -532,7 +532,7 @@ libyosys.so: $(filter-out kernel/driver.o,$(OBJS))
 
 %.pyh: %.h
 	$(Q) mkdir -p $(dir $@)
-	$(P) cat $< | grep -E -v "#[ ]*(include|error)" | $(LD) -x c++ -o $@ -E -P -Qunused-arguments -
+	$(P) cat $< | grep -E -v "#[ ]*(include|error)" | $(LD) -x c++ -o $@ -E -P -
 
 $(PY_WRAPPER_FILE).cc: $(PY_GEN_SCRIPT).py $(PY_WRAP_INCLUDES)
 	$(Q) mkdir -p $(dir $@)