diff --git a/libavcodec/hevc_parser.c b/libavcodec/hevc_parser.c
index 59f9a0ff3e..d03af01fd0 100644
--- a/libavcodec/hevc_parser.c
+++ b/libavcodec/hevc_parser.c
@@ -105,7 +105,7 @@ static int hevc_parse_slice_header(AVCodecParserContext *s, H2645NAL *nal,
         den = ps->sps->vui.vui_time_scale;
     }
 
-    if (num != 0 && den != 0)
+    if (num > 0 && den > 0)
         av_reduce(&avctx->framerate.den, &avctx->framerate.num,
                   num, den, 1 << 30);
 
diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
index 0e2844f47c..8f6e965a3a 100644
--- a/libavcodec/hevcdec.c
+++ b/libavcodec/hevcdec.c
@@ -374,7 +374,7 @@ static void export_stream_params(HEVCContext *s, const HEVCSPS *sps)
         den = sps->vui.vui_time_scale;
     }
 
-    if (num != 0 && den != 0)
+    if (num > 0 && den > 0)
         av_reduce(&avctx->framerate.den, &avctx->framerate.num,
                   num, den, 1 << 30);
 }