diff --git a/tools/mm/slabinfo.c b/tools/mm/slabinfo.c
index 80cdbd3db82d..54c7265ab52d 100644
--- a/tools/mm/slabinfo.c
+++ b/tools/mm/slabinfo.c
@@ -1405,7 +1405,7 @@ struct option opts[] = {
 	{ "numa", no_argument, NULL, 'n' },
 	{ "lines", required_argument, NULL, 'N'},
 	{ "ops", no_argument, NULL, 'o' },
-	{ "partial", no_argument, NULL, 'p'},
+	{ "partial", no_argument, NULL, 'P'},
 	{ "report", no_argument, NULL, 'r' },
 	{ "shrink", no_argument, NULL, 's' },
 	{ "Size", no_argument, NULL, 'S'},