diff --git a/src/port/exec.c b/src/port/exec.c
index 077ac58b2b2..ceb886733c8 100644
--- a/src/port/exec.c
+++ b/src/port/exec.c
@@ -308,7 +308,7 @@ find_other_exec(const char *argv0, const char *target,
 				const char *versionstr, char *retpath)
 {
 	char		cmd[MAXPGPATH];
-	char		line[100];
+	char		line[MAXPGPATH];
 
 	if (find_my_exec(argv0, retpath) < 0)
 		return -1;