diff --git a/Makefile b/Makefile
index 9b174f5..2e76f6d 100644
--- a/Makefile
+++ b/Makefile
@@ -14,12 +14,14 @@ all: navmon.pb.cc $(PROGRAMS)
 
 -include *.d
 
-clean:
-	rm -f *~ *.o *.d ext/*/*.o $(PROGRAMS) navmon.pb.h navmon.pb.cc $(patsubst %.cc,%.o,$(wildcard ext/sgp4/libsgp4/*.cc))
-
 H2OPP=ext/powerblog/h2o-pp.o
 SIMPLESOCKETS=ext/powerblog/ext/simplesocket/swrappers.o ext/powerblog/ext/simplesocket/sclasses.o  ext/powerblog/ext/simplesocket/comboaddress.o 
 
+clean:
+	rm -f *~ *.o *.d ext/*/*.o $(PROGRAMS) navmon.pb.h navmon.pb.cc $(patsubst %.cc,%.o,$(wildcard ext/sgp4/libsgp4/*.cc)) $(H2OPP) $(SIMPLESOCKETS)
+	rm -f ext/fmt-5.2.1/src/format.o
+
+
 navparse: navparse.o ext/fmt-5.2.1/src/format.o $(H2OPP) $(SIMPLESOCKETS) minicurl.o ubx.o bits.o navmon.pb.o gps.o ephemeris.o beidou.o glonass.o $(patsubst %.cc,%.o,$(wildcard ext/sgp4/libsgp4/*.cc)) tle.o navmon.o
 	$(CXX) -std=gnu++17 $^ -o $@ -pthread -L/usr/local/lib -L/usr/local/opt/openssl/lib/  -lh2o-evloop -lssl -lcrypto -lz  -lcurl -lprotobuf  $(WSLAY)