diff --git a/genex/comp.c b/genex/comp.c
index 253b2be..dcc709c 100644
--- a/genex/comp.c
+++ b/genex/comp.c
@@ -51,7 +51,7 @@ next:
 			}
 			break;
 		}
-		for (p = e = s--; *p && *p != '#' && *p != '\n'; p++)
+		for (p = e = --s; *p && *p != '#' && *p != '\n'; p++)
 			if (*p != ' ' && *p != '\t')
 				e = p;
 		if (!last && n) {