diff --git a/passes/techmap/Makefile.inc b/passes/techmap/Makefile.inc
index 97d8b76f3..ed2f1c0bf 100644
--- a/passes/techmap/Makefile.inc
+++ b/passes/techmap/Makefile.inc
@@ -56,5 +56,5 @@ EXTRA_OBJS += passes/techmap/filterlib.o
 
 $(PROGRAM_PREFIX)yosys-filterlib$(EXE): passes/techmap/filterlib.o
 	$(Q) mkdir -p $(dir $@)
-	$(P) $(LD) -o $(PROGRAM_PREFIX)yosys-filterlib$(EXE) $(LDFLAGS) $^ $(LDLIBS)
+	$(P) $(CXX) -o $(PROGRAM_PREFIX)yosys-filterlib$(EXE) $(LDFLAGS) $^ $(LDLIBS)
 endif