diff --git a/tools/gen_header_for_bin_reduce.py b/tools/gen_header_for_bin_reduce.py
index 39fdf3005c2d889fa01e6d73cef5e3b4e5f92d1d..337b83db5436636eeefd3c6ac68a1f709e477362 100755
--- a/tools/gen_header_for_bin_reduce.py
+++ b/tools/gen_header_for_bin_reduce.py
@@ -185,7 +185,7 @@ class HeaderGen:
         ).stdout.decode('utf-8')
         self._fout.write('// midout \n')
         self._fout.write(cvt)
-        if cvt.find(" half,"):
+        if cvt.find(" half,") > 0:
             change = open(self._fout.name).read().replace(" half,", " __fp16,")
             with open("fix_fp16_bin_reduce.h", "w") as fix_fp16:
                 fix_fp16.write(change)