diff --git a/doc/filters.texi b/doc/filters.texi
index 442fe35466..fdbe3b7671 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -6019,7 +6019,7 @@ spectrum.
 The filter accepts the following named parameters:
 @table @option
 @item size, s
-Specify the video size for the output. Default value is @code{640x480}.
+Specify the video size for the output. Default value is @code{640x512}.
 @item slide
 Specify if the spectrum should slide along the window. Default value is
 @code{0}.
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 977fca92a6..d8aed0d773 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -51,8 +51,8 @@ typedef struct {
 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
 static const AVOption showspectrum_options[] = {
-    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, FLAGS },
-    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, FLAGS },
+    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
+    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
     { "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
     { NULL },
 };