diff --git a/kmod/src/counters.h b/kmod/src/counters.h
index acfe5c7a..06314b40 100644
--- a/kmod/src/counters.h
+++ b/kmod/src/counters.h
@@ -91,6 +91,7 @@
 	EXPAND_COUNTER(radix_enospc_data)			\
 	EXPAND_COUNTER(radix_enospc_paths)			\
 	EXPAND_COUNTER(radix_enospc_synth)			\
+	EXPAND_COUNTER(radix_merge_retry)			\
 	EXPAND_COUNTER(trans_commit_data_alloc_low)		\
 	EXPAND_COUNTER(trans_commit_fsync)			\
 	EXPAND_COUNTER(trans_commit_full)			\
diff --git a/kmod/src/radix.c b/kmod/src/radix.c
index a3d10272..c8940d3f 100644
--- a/kmod/src/radix.c
+++ b/kmod/src/radix.c
@@ -1454,6 +1454,7 @@ wrapped:
 		/* back out and retry if no input left, or inp not ro */
 		if (inp_sm == 0 ||
 		    (inp != src && paths_share_blocks(inp_path, src_path))) {
+			scoutfs_inc_counter(sb, radix_merge_retry);
 			free_path(sb, inp_path);
 			inp_path = NULL;
 			free_change(sb, chg);