diff --git a/src/build.rules b/src/build.rules
index 4b04eca58..bdcae6551 100644
--- a/src/build.rules
+++ b/src/build.rules
@@ -76,10 +76,10 @@ _DIRS := $(BUILDDIR)/$(PROJ)
 _make_dirs:
 	@mkdir -p $(_DIRS)
 
-$(BUILDDIR)/$(PROJ)/src/%.o: $(ROOTDIR)src/%.c | _make_dirs
+$(BUILDDIR)/$(PROJ)/src/%.o: $(ROOTDIR)src/%.c $(CONFIG_FILE) | _make_dirs
 	$(Q)$(CC) -c -o $@ $(CFLAGS) $<
 	@$(E) "  CC " $<
-$(BUILDDIR)/$(PROJ)/%.o: %.c | _make_dirs
+$(BUILDDIR)/$(PROJ)/%.o: %.c $(CONFIG_FILE) | _make_dirs
 	$(Q)$(CC) -c -o $@ $(CFLAGS) $<
 	@$(E) "  CC " $<
 
diff --git a/wpa_supplicant/Makefile b/wpa_supplicant/Makefile
index 9f81addd8..c858f43b5 100644
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -1866,8 +1866,6 @@ wpa_priv: $(BCHECK) $(OBJS_priv)
 	$(Q)$(LDO) $(LDFLAGS) -o wpa_priv $(OBJS_priv) $(LIBS)
 	@$(E) "  LD " $@
 
-$(OBJS_c) $(OBJS_t) $(OBJS_t2) $(OBJS) $(BCHECK) $(EXTRA_progs): .config
-
 _OBJS_VAR := OBJS
 include ../src/objs.mk
 wpa_supplicant: $(BCHECK) $(OBJS) $(EXTRA_progs)