diff --git a/Makefile b/Makefile
index c7c90e5f33..5223417b99 100644
--- a/Makefile
+++ b/Makefile
@@ -2093,7 +2093,7 @@ endif
 
 ASM_SRC := $(wildcard $(OBJECTS:o=S))
 ASM_OBJ := $(ASM_SRC:S=o)
-C_OBJ := $(filter-out $(ASM_OBJ),$(OBJECTS))
+C_OBJ := $(filter-out $(COMPAT_OBJS),$(filter-out $(ASM_OBJ),$(OBJECTS)))
 
 .SUFFIXES:
 
@@ -2133,6 +2133,8 @@ endif
 ifndef CHECK_HEADER_DEPENDENCIES
 $(C_OBJ): %.o: %.c GIT-CFLAGS $(missing_dep_dirs)
 	$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $<
+$(COMPAT_OBJS): %.o: %.c GIT-CFLAGS $(missing_dep_dirs)
+	$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(filter-out -Wold-style-definition,$(ALL_CFLAGS)) $(EXTRA_CPPFLAGS) $<
 $(ASM_OBJ): %.o: %.S GIT-CFLAGS $(missing_dep_dirs)
 	$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $<
 endif