diff --git a/Makefile b/Makefile
index 0c025b2..cd96bf4 100644
--- a/Makefile
+++ b/Makefile
@@ -154,7 +154,7 @@ list: $(BINARY).list
 	$(Q)$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJ) $(LIB_OBJ) $(LDLIBS) -o $(@)
 	$(Q)size $(@)
 
-%.o: %.c
+%.o: %.c $(CHDR) $(LIB_CHDR)
 	$(Q)$(CC) $(CFLAGS) $(ARCH_FLAGS) -o $(@) -c $(<)
 
 # generate dependencies