Index: modules/mappers/mod_rewrite.c
===================================================================
--- modules/mappers/mod_rewrite.c	(revision 574201)
+++ modules/mappers/mod_rewrite.c	(working copy)
@@ -135,6 +135,7 @@
 #define CONDFLAG_NOCASE             1<<1
 #define CONDFLAG_NOTMATCH           1<<2
 #define CONDFLAG_ORNEXT             1<<3
+#define CONDFLAG_NOVARY             1<<4
 
 #define RULEFLAG_NONE               1<<0
 #define RULEFLAG_FORCEREDIRECT      1<<1
@@ -3207,6 +3208,10 @@
              || strcasecmp(key, "OR") == 0    ) {
         cfg->flags |= CONDFLAG_ORNEXT;
     }
+    else if (   strcasecmp(key, "novary") == 0
+             || strcasecmp(key, "NV") == 0    ) {
+        cfg->flags |= CONDFLAG_NOVARY;
+    }
     else {
         return apr_pstrcat(p, "RewriteCond: unknown flag '", key, "'", NULL);
     }
@@ -3908,6 +3913,12 @@
         rewritecond_entry *c = &conds[i];
 
         rc = apply_rewrite_cond(c, ctx);
+        /*
+         * Reset vary_this if the novary flag is for this condition.
+         */
+        if (c->flags & CONDFLAG_NOVARY) {
+            ctx->vary_this = NULL;
+        }
         if (c->flags & CONDFLAG_ORNEXT) {
             if (!rc) {
                 /* One condition is false, but another can be still true. */