diff --git a/patch/externalpipe.c b/patch/externalpipe.c
index 37d8848..aea3be2 100644
--- a/patch/externalpipe.c
+++ b/patch/externalpipe.c
@@ -42,7 +42,11 @@ externalpipe(const Arg *arg)
 	newline = 0;
 	for (n = 0; n < term.row; n++) {
 		bp = term.line[n];
+		#if REFLOW_PATCH
+		lastpos = MIN(tlinelen(TLINE(n)), term.col) - 1;
+		#else
 		lastpos = MIN(tlinelen(n) + 1, term.col) - 1;
+		#endif // REFLOW_PATCH
 		if (lastpos < 0)
 			break;
 		end = &bp[lastpos + 1];