diff --git a/tccrun.c b/tccrun.c
index 8f7257d..8e53a70 100644
--- a/tccrun.c
+++ b/tccrun.c
@@ -127,6 +127,7 @@ LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
         for (i=0; i<argc; ++i)
             bound_new_region(argv[i], strlen(argv[i]));
 
+	errno = 0; /* clean errno value */
         ret = (*prog_main)(argc, argv);
 
         /* unmark argv area */
@@ -137,7 +138,10 @@ LIBTCCAPI int tcc_run(TCCState *s1, int argc, char **argv)
         bound_exit();
     } else
 #endif
+    {
+	errno = 0; /* clean errno value */
         ret = (*prog_main)(argc, argv);
+    }
     return ret;
 }