diff --git a/Makefile.nmake b/Makefile.nmake
index 15954f5..b7e0170 100755
--- a/Makefile.nmake
+++ b/Makefile.nmake
@@ -38,4 +38,4 @@ TEST:TESTER
 	tests\test_with_test_vectors.exe
 
 clean:
-	del $(OBJS) $(LIBRARY) *.bak *.exe tests\test_with_test_vectors.exe
+	del $(OBJS) $(LIBRARY) *.obj *.bak *.exe tests\*.obj tests\test_with_test_vectors.exe