Incorrect ZopfliPNG static library build rule

[OpenA]

It's not include zopfli object files (and not working if i just separatly linking libzopflipng.a + libzopfli.a in my project)

diff --git a/Makefile b/Makefile
index 5407de8..36a80ae 100644
--- a/Makefile
+++ b/Makefile
@@ -57,7 +57,7 @@ libzopflipng: $(ZOPFLILIB_OBJ) $(LODEPNG_OBJ) $(ZOPFLIPNGLIB_OBJ)
 	$(CXX) $^ $(CFLAGS) --shared -Wl,-soname,libzopflipng.so.1 -o libzopflipng.so.1.0.3 $(LDFLAGS)
 
 # ZopfliPNG static library
-libzopflipng.a: $(LODEPNG_OBJ) $(ZOPFLIPNGLIB_OBJ)
+libzopflipng.a: $(LODEPNG_OBJ) $(ZOPFLILIB_OBJ) $(ZOPFLIPNGLIB_OBJ)
 	ar rcs $@ $^
 
 # Remove all libraries and binaries

but in shared library it have and all working

# ZopfliPNG shared library
libzopflipng: $(ZOPFLILIB_OBJ) $(LODEPNG_OBJ) $(ZOPFLIPNGLIB_OBJ)
	$(CXX) $^ $(CFLAGS) --shared -Wl,-soname,libzopflipng.so.1 -o libzopflipng.so.1.0.3 $(LDFLAGS)