diff --git a/src/nvim/tui/termkey/driver-csi.c b/src/nvim/tui/termkey/driver-csi.c
index d427be50ff..f8e503a9d2 100644
--- a/src/nvim/tui/termkey/driver-csi.c
+++ b/src/nvim/tui/termkey/driver-csi.c
@@ -507,7 +507,7 @@ static TermKeyResult parse_csi(TermKey *tk, size_t introlen, size_t *csi_len,
       present = 0;
       argi++;
 
-      if (argi > 16) {
+      if (argi >= 16) {
         break;
       }
     } else if (c >= 0x20 && c <= 0x2f) {