1 files changed, 4 insertions, 1 deletions

diff --git a/usr.sbin/sysinstall/variable.c b/usr.sbin/sysinstall/variable.c
index 40f2284608a9..1e2bf9a54845 100644
--- a/usr.sbin/sysinstall/variable.c
+++ b/usr.sbin/sysinstall/variable.c
@@ -58,7 +58,8 @@ make_variable(char *var, char *value, int dirty)
 	    setenv(var, value, 1);
 	    free(vp->value);
 	    vp->value = strdup(value);
-	    vp->dirty = dirty;
+	    if (dirty != -1)
+		vp->dirty = dirty;
 	    return;
 	}
     }
@@ -68,6 +69,8 @@ make_variable(char *var, char *value, int dirty)
     vp = (Variable *)safe_malloc(sizeof(Variable));
     vp->name = strdup(var);
     vp->value = strdup(value);
+    if (dirty == -1)
+	dirty = 0;
     vp->dirty = dirty;
     vp->next = VarHead;
     VarHead = vp;