diff --git a/examples/nettest/Makefile b/examples/nettest/Makefile
index 3b79a8f35..b41eeccf9 100644
--- a/examples/nettest/Makefile
+++ b/examples/nettest/Makefile
@@ -157,7 +157,7 @@ else
 context:
 endif
 
-.depend: Makefile $(TARG_SRCS)
+.depend: Makefile config.h $(TARG_SRCS)
 	@$(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(TARG_SRCS) >Make.dep
 	@touch $@
 
diff --git a/examples/udp/Makefile b/examples/udp/Makefile
index 156164ee4..0ac348fba 100644
--- a/examples/udp/Makefile
+++ b/examples/udp/Makefile
@@ -138,7 +138,7 @@ endif
 
 context:
 
-.depend: Makefile $(TARG_SRCS)
+.depend: Makefile config.h $(TARG_SRCS)
 	@$(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(TARG_SRCS) >Make.dep
 	@touch $@