diff --git a/st.c b/st.c
index a8f8232..50226d1 100644
--- a/st.c
+++ b/st.c
@@ -2330,7 +2330,7 @@ tputc(Rune u)
 		if (term.esc&ESC_DCS && strescseq.len == 0 && u == 'q')
 			term.mode |= MODE_SIXEL;
 
-		if (strescseq.len+len >= sizeof(strescseq.buf)-1) {
+		if (strescseq.len+len >= sizeof(strescseq.buf)) {
 			/*
 			 * Here is a bug in terminals. If the user never sends
 			 * some code to stop the str or esc command, then st