1 files changed, 1 insertions, 1 deletions
diff --git a/Arduino.mk b/Arduino.mk
index 1fa80ff..d226e6e 100644
--- a/Arduino.mk
+++ b/Arduino.mk
@@ -1029,7 +1029,7 @@ $(OBJDIR)/libs/%.o: $(ARDUINO_LIB_PATH)/%.S
 
 $(OBJDIR)/libs/%.o: $(USER_LIB_PATH)/%.cpp
 	@$(MKDIR) $(dir $@)
-	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+	$(CC) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
 
 $(OBJDIR)/libs/%.o: $(USER_LIB_PATH)/%.c
 	@$(MKDIR) $(dir $@)