Index: libhb/encx264.c
===================================================================
--- libhb/encx264.c	(revision 997)
+++ libhb/encx264.c	(working copy)
@@ -99,7 +99,9 @@
 
     if( job->x264opts != NULL && *job->x264opts != '\0' )
     {
+        /* Work on a duplicate to prevent modifying the original */
         char *x264opts = strdup(job->x264opts);
+        char *temp = x264opts;
         while( *x264opts )
         {
             char *name = x264opts;
@@ -161,7 +163,7 @@
             if( ret == X264_PARAM_BAD_VALUE )
                 hb_log( "x264 options: Bad argument %s=%s", name, value ? value : "(null)" );
         }
-        free(x264opts);
+        free(temp);
     }