diff --git a/Makefile.grf.in b/Makefile.grf.in
index 9be2c7a260..6aa5068b6a 100644
--- a/Makefile.grf.in
+++ b/Makefile.grf.in
@@ -73,9 +73,8 @@ $(OBJS_DIR)/openttd.grf: $(PCX_FILES) $(NFO_FILES) $(OBJS_DIR)/sprites
 clean:
 	$(Q)rm -f *.bak *.grf
 
-# Clean up temporary files and result of generation, i.e. the grfs.
+# Clean up temporary files
 mrproper: clean
 	$(Q)rm -fr sprites
-	$(Q)rm -f $(BIN_DIR)/openttd.grf
 
 .PHONY: all mrproper depend clean
diff --git a/Makefile.in b/Makefile.in
index 99f12462c3..054466745e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -147,6 +147,9 @@ mrproper:
 	$(Q)rm -rf $(BIN_DIR)/ai/regression/content_download $(BIN_DIR)/ai/regression/save $(BIN_DIR)/ai/regression/scenario
 distclean: mrproper
 
+maintainer-clean: distclean
+	$(Q)rm -f $(BIN_DIR)/data/openttd.grf
+
 depend:
 	@for dir in $(SRC_DIRS); do \
 		$(MAKE) -C $$dir depend; \