diff --git a/make/depend.mk b/make/depend.mk
index 510641a4..23e1892d 100644
--- a/make/depend.mk
+++ b/make/depend.mk
@@ -26,19 +26,20 @@ endif
 
 %.o: .%.o.dep.mk
 
-.%.o.dep.mk: %.cpp $(BUILD_HDR)
+.%.o.dep.mk: %.cpp $(BUILD_HDR) $(SRC_H)
 	$(CC) -M $(FINAL_CXXFLAGS) $(FINAL_CPPFLAGS) $(DEPEND_CXXFLAGS) $< -o $@
 
-.%.o.dep.mk: %.cc $(BUILD_HDR)
+.%.o.dep.mk: %.cc $(BUILD_HDR) $(SRC_H)
 	$(CC) -M $(FINAL_CXXFLAGS) $(FINAL_CPPFLAGS) $(DEPEND_CXXFLAGS) $< -o $@
 
-.%.o.dep.mk: %.c $(BUILD_HDR)
+.%.o.dep.mk: %.c $(BUILD_HDR) $(SRC_H)
 	$(CC) -M $(FINAL_CFLAGS) $(FINAL_CPPFLAGS) $(DEPEND_CXXFLAGS) $< -o $@
 
 show-vars: show-vars-depend-mk
 show-vars-depend-mk:
 	@echo DEPEND_MK = $(DEPEND_MK)
 	@echo BUILD_HDR = $(BUILD_HDR)
+	@echo SRC_H     = $(SRC_H)
 
 endif # DEPEND_MK_INCLUDED
 DEPEND_MK_INCLUDED          := true