diff --git a/data/Makefile b/data/Makefile
index 571b7ce..eaf4b1c 100644
--- a/data/Makefile
+++ b/data/Makefile
@@ -21,11 +21,14 @@ $(PROVIDERS):
 	@md5sum -c $@ || wget "ftp://ftp.ripe.net/pub/stats/$(basename $@)/delegated-$(basename $@)-extended-latest" -O $(basename $@) ; true
 
 $(DEST): $(PROVIDERS)
-	@cat $(PROVIDERS) | grep -v asn | grep -v summary | grep -v '#' | grep ipv[46] | sort -n -k 4 -t '|' > $(DEST)
+	@cat $(PROVIDERS) | grep -v asn | grep -v summary | grep -v '#' | grep ipv[46] | grep -v reserved | sort -n -k 4 -t '|' > $(DEST)
 
 $(IP_DATA): $(DEST)
 	@echo "Rebuild ip_data.c"
 	@./build_c_array.py > ../src/ip_data.c
 
+force_ip_data:
+	@echo "Force rebuild ip_data.c"
+	@./build_c_array.py > ../src/ip_data.c
 clean:
 	rm -f $(PROVIDERS) $(DEST) $(SHA1_FILE) $(MD5)
\ No newline at end of file