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-rw-r--r--Src/params.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/Src/params.c b/Src/params.c
index 35f699033..1a04d7904 100644
--- a/Src/params.c
+++ b/Src/params.c
@@ -2286,7 +2286,10 @@ stdunsetfn(Param pm, int exp)
 	case PM_SCALAR: pm->sets.cfn(pm, NULL); break;
 	case PM_ARRAY:  pm->sets.afn(pm, NULL); break;
 	case PM_HASHED: pm->sets.hfn(pm, NULL); break;
-	default: pm->u.str = NULL; break;
+	default:
+	    if (!(pm->flags & PM_SPECIAL))
+	    	pm->u.str = NULL;
+	    break;
     }
     pm->flags |= PM_UNSET;
 }