diff --git a/libavfilter/buffersrc.c b/libavfilter/buffersrc.c
index 29e5b8684e..25c6386d4e 100644
--- a/libavfilter/buffersrc.c
+++ b/libavfilter/buffersrc.c
@@ -170,11 +170,11 @@ unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
 #define OFFSET(x) offsetof(BufferSourceContext, x)
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 static const AVOption buffer_options[] = {
-    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL,   { 0 }, 0, INT_MAX, FLAGS },
-    { "frame_rate",     NULL, OFFSET(frame_rate),          AV_OPT_TYPE_RATIONAL,   { 0 }, 0, INT_MAX, FLAGS },
+    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL,   { .dbl = 0 }, 0, INT_MAX, FLAGS },
+    { "frame_rate",     NULL, OFFSET(frame_rate),          AV_OPT_TYPE_RATIONAL,   { .dbl = 0 }, 0, INT_MAX, FLAGS },
     { "video_size",     NULL, OFFSET(w),                   AV_OPT_TYPE_IMAGE_SIZE, .flags = FLAGS },
     { "pix_fmt",        NULL, OFFSET(pix_fmt),             AV_OPT_TYPE_PIXEL_FMT,  .flags = FLAGS },
-    { "pixel_aspect",   NULL, OFFSET(pixel_aspect),        AV_OPT_TYPE_RATIONAL,   { 0 }, 0, INT_MAX, FLAGS },
+    { "pixel_aspect",   NULL, OFFSET(pixel_aspect),        AV_OPT_TYPE_RATIONAL,   { .dbl = 0 }, 0, INT_MAX, FLAGS },
     { "sws_param",      NULL, OFFSET(sws_param),           AV_OPT_TYPE_STRING,     .flags = FLAGS },
     { NULL },
 };
@@ -239,7 +239,7 @@ fail:
 
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
 static const AVOption abuffer_options[] = {
-    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, FLAGS },
+    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
     { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, FLAGS },
     { "sample_fmt",     NULL, OFFSET(sample_fmt_str),      AV_OPT_TYPE_STRING, .flags = FLAGS },
     { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING, .flags = FLAGS },
diff --git a/libavutil/opt.c b/libavutil/opt.c
index 18af0edec3..960170b86f 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -906,7 +906,7 @@ typedef struct TestContext
 static const AVOption test_options[]= {
 {"num",      "set num",        OFFSET(num),      AV_OPT_TYPE_INT,      {.i64 = 0},       0,        100                 },
 {"toggle",   "set toggle",     OFFSET(toggle),   AV_OPT_TYPE_INT,      {.i64 = 0},       0,        1                   },
-{"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {0},              0,        10                  },
+{"rational", "set rational",   OFFSET(rational), AV_OPT_TYPE_RATIONAL, {.dbl = 0},  0,        10                  },
 {"string",   "set string",     OFFSET(string),   AV_OPT_TYPE_STRING,   {0},              CHAR_MIN, CHAR_MAX            },
 {"flags",    "set flags",      OFFSET(flags),    AV_OPT_TYPE_FLAGS,    {.i64 = 0},       0,        INT_MAX, 0, "flags" },
 {"cool",     "set cool flag ", 0,                AV_OPT_TYPE_CONST,    {.i64 = TEST_FLAG_COOL}, INT_MIN,  INT_MAX, 0, "flags" },