diff --git a/libavfilter/formats.c b/libavfilter/formats.c
index 36e45c53c1..5ba961f059 100644
--- a/libavfilter/formats.c
+++ b/libavfilter/formats.c
@@ -389,6 +389,7 @@ static void print_sample_rate(AVBPrint *bp, const void *ratesp)
 
 static const AVFilterFormatsMerger mergers_video[] = {
     {
+        .name       = "Pixel formats",
         .offset     = offsetof(AVFilterFormatsConfig, formats),
         .merge      = merge_pix_fmts,
         .can_merge  = can_merge_pix_fmts,
@@ -396,6 +397,7 @@ static const AVFilterFormatsMerger mergers_video[] = {
         CONVERSION_FILTER_SWSCALE
     },
     {
+        .name       = "Color spaces",
         .offset     = offsetof(AVFilterFormatsConfig, color_spaces),
         .merge      = merge_generic,
         .can_merge  = can_merge_generic,
@@ -403,6 +405,7 @@ static const AVFilterFormatsMerger mergers_video[] = {
         CONVERSION_FILTER_SWSCALE
     },
     {
+        .name       = "Color ranges",
         .offset     = offsetof(AVFilterFormatsConfig, color_ranges),
         .merge      = merge_generic,
         .can_merge  = can_merge_generic,
@@ -410,6 +413,7 @@ static const AVFilterFormatsMerger mergers_video[] = {
         CONVERSION_FILTER_SWSCALE
     },
     {
+        .name       = "Alpha modes",
         .offset     = offsetof(AVFilterFormatsConfig, alpha_modes),
         .merge      = merge_generic,
         .can_merge  = can_merge_generic,
@@ -420,6 +424,7 @@ static const AVFilterFormatsMerger mergers_video[] = {
 
 static const AVFilterFormatsMerger mergers_audio[] = {
     {
+        .name       = "Channel layouts",
         .offset     = offsetof(AVFilterFormatsConfig, channel_layouts),
         .merge      = merge_channel_layouts,
         .can_merge  = can_merge_channel_layouts,
@@ -427,6 +432,7 @@ static const AVFilterFormatsMerger mergers_audio[] = {
         CONVERSION_FILTER_ARESAMPLE
     },
     {
+        .name       = "Sample rates",
         .offset     = offsetof(AVFilterFormatsConfig, samplerates),
         .merge      = merge_samplerates,
         .can_merge  = can_merge_samplerates,
@@ -434,6 +440,7 @@ static const AVFilterFormatsMerger mergers_audio[] = {
         CONVERSION_FILTER_ARESAMPLE
     },
     {
+        .name       = "Sample formats",
         .offset     = offsetof(AVFilterFormatsConfig, formats),
         .merge      = merge_sample_fmts,
         .can_merge  = can_merge_sample_fmts,
diff --git a/libavfilter/formats.h b/libavfilter/formats.h
index 4fe96187ba..969bb230f1 100644
--- a/libavfilter/formats.h
+++ b/libavfilter/formats.h
@@ -516,6 +516,7 @@ int ff_formats_check_alpha_modes(void *log, const AVFilterFormats *fmts);
 struct AVBPrint;
 
 typedef struct AVFilterFormatMerger {
+    const char *name;
     unsigned offset;
     int (*merge)(void *a, void *b);
     int (*can_merge)(const void *a, const void *b);