diff --git a/runtime/oblink.c b/runtime/oblink.c
index f038ce2..786f2e6 100644
--- a/runtime/oblink.c
+++ b/runtime/oblink.c
@@ -149,7 +149,8 @@ static void scan_files(void) {
      if (stdlib) {
           char buf[128];
 
-	  snprintf(buf, 128, "%s%s%s", libdir, DIRSEP, lscript);
+	  if (snprintf(buf, 128, "%s%s%s", libdir, DIRSEP, lscript) < 0)
+               panic("lscript path truncated");
           FILE *fp = fopen(buf, "r");
 	  if (fp == NULL) {
 	       perror(buf);
@@ -158,7 +159,8 @@ static void scan_files(void) {
 
 	  while (fgets(line, MAXLINE, fp) != NULL) {
 	       line[strlen(line)-1] = '\0';
-	       snprintf(buf, 128, "%s%s%s", libdir, DIRSEP, line);
+	       if (snprintf(buf, 128, "%s%s%s", libdir, DIRSEP, line) < 0)
+                    panic("library path truncated");
 	       scan(must_strdup(buf), TRUE);
 	  }