diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 1c63786..b7d07da 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -2436,10 +2436,8 @@
         ngx_conf_merge_value(conf->upstream.store,
                               prev->upstream.store, 0);
 
-        if (conf->upstream.store_lengths == NULL) {
-            conf->upstream.store_lengths = prev->upstream.store_lengths;
-            conf->upstream.store_values = prev->upstream.store_values;
-        }
+        conf->upstream.store_lengths = prev->upstream.store_lengths;
+        conf->upstream.store_values = prev->upstream.store_values;
     }
 
     ngx_conf_merge_uint_value(conf->upstream.store_access,
@@ -3206,9 +3204,7 @@
     ngx_str_t                  *value;
     ngx_http_script_compile_t   sc;
 
-    if (flcf->upstream.store != NGX_CONF_UNSET
-        || flcf->upstream.store_lengths)
-    {
+    if (flcf->upstream.store != NGX_CONF_UNSET) {
         return "is duplicate";
     }
 
@@ -3229,8 +3225,9 @@
 
 #endif
 
+    flcf->upstream.store = 1;
+
     if (ngx_strcmp(value[1].data, "on") == 0) {
-        flcf->upstream.store = 1;
         return NGX_CONF_OK;
     }
 
@@ -3275,7 +3272,7 @@
         return NGX_CONF_OK;
     }
 
-    if (flcf->upstream.store > 0 || flcf->upstream.store_lengths) {
+    if (flcf->upstream.store > 0) {
         return "is incompatible with \"fastcgi_store\"";
     }
 
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index c3105e2..323d03d 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -2628,10 +2628,8 @@
         ngx_conf_merge_value(conf->upstream.store,
                               prev->upstream.store, 0);
 
-        if (conf->upstream.store_lengths == NULL) {
-            conf->upstream.store_lengths = prev->upstream.store_lengths;
-            conf->upstream.store_values = prev->upstream.store_values;
-        }
+        conf->upstream.store_lengths = prev->upstream.store_lengths;
+        conf->upstream.store_values = prev->upstream.store_values;
     }
 
     ngx_conf_merge_uint_value(conf->upstream.store_access,
@@ -3794,9 +3792,7 @@
     ngx_str_t                  *value;
     ngx_http_script_compile_t   sc;
 
-    if (plcf->upstream.store != NGX_CONF_UNSET
-        || plcf->upstream.store_lengths)
-    {
+    if (plcf->upstream.store != NGX_CONF_UNSET) {
         return "is duplicate";
     }
 
@@ -3817,8 +3813,9 @@
 
 #endif
 
+    plcf->upstream.store = 1;
+
     if (ngx_strcmp(value[1].data, "on") == 0) {
-        plcf->upstream.store = 1;
         return NGX_CONF_OK;
     }
 
@@ -3863,7 +3860,7 @@
         return NGX_CONF_OK;
     }
 
-    if (plcf->upstream.store > 0 || plcf->upstream.store_lengths) {
+    if (plcf->upstream.store > 0) {
         return "is incompatible with \"proxy_store\"";
     }
 
diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
index c8cf9aa..8369d56 100644
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c
@@ -1189,10 +1189,8 @@
     if (conf->upstream.store == NGX_CONF_UNSET) {
         ngx_conf_merge_value(conf->upstream.store, prev->upstream.store, 0);
 
-        if (conf->upstream.store_lengths == NULL) {
-            conf->upstream.store_lengths = prev->upstream.store_lengths;
-            conf->upstream.store_values = prev->upstream.store_values;
-        }
+        conf->upstream.store_lengths = prev->upstream.store_lengths;
+        conf->upstream.store_values = prev->upstream.store_values;
     }
 
     ngx_conf_merge_uint_value(conf->upstream.store_access,
@@ -1760,7 +1758,7 @@
     ngx_str_t                  *value;
     ngx_http_script_compile_t   sc;
 
-    if (scf->upstream.store != NGX_CONF_UNSET || scf->upstream.store_lengths) {
+    if (scf->upstream.store != NGX_CONF_UNSET) {
         return "is duplicate";
     }
 
@@ -1781,8 +1779,9 @@
 
 #endif
 
+    scf->upstream.store = 1;
+
     if (ngx_strcmp(value[1].data, "on") == 0) {
-        scf->upstream.store = 1;
         return NGX_CONF_OK;
     }
 
@@ -1827,7 +1826,7 @@
         return NGX_CONF_OK;
     }
 
-    if (scf->upstream.store > 0 || scf->upstream.store_lengths) {
+    if (scf->upstream.store > 0) {
         return "is incompatible with \"scgi_store\"";
     }
 
diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
index 8e269d7..0243e00 100644
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c
@@ -1403,10 +1403,8 @@
     if (conf->upstream.store == NGX_CONF_UNSET) {
         ngx_conf_merge_value(conf->upstream.store, prev->upstream.store, 0);
 
-        if (conf->upstream.store_lengths == NULL) {
-            conf->upstream.store_lengths = prev->upstream.store_lengths;
-            conf->upstream.store_values = prev->upstream.store_values;
-        }
+        conf->upstream.store_lengths = prev->upstream.store_lengths;
+        conf->upstream.store_values = prev->upstream.store_values;
     }
 
     ngx_conf_merge_uint_value(conf->upstream.store_access,
@@ -2047,8 +2045,7 @@
     ngx_str_t                  *value;
     ngx_http_script_compile_t   sc;
 
-    if (uwcf->upstream.store != NGX_CONF_UNSET || uwcf->upstream.store_lengths)
-    {
+    if (uwcf->upstream.store != NGX_CONF_UNSET) {
         return "is duplicate";
     }
 
@@ -2069,8 +2066,9 @@
 
 #endif
 
+    uwcf->upstream.store = 1;
+
     if (ngx_strcmp(value[1].data, "on") == 0) {
-        uwcf->upstream.store = 1;
         return NGX_CONF_OK;
     }
 
@@ -2115,7 +2113,7 @@
         return NGX_CONF_OK;
     }
 
-    if (uwcf->upstream.store > 0 || uwcf->upstream.store_lengths) {
+    if (uwcf->upstream.store > 0) {
         return "is incompatible with \"uwsgi_store\"";
     }
 
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 337ec3e..0693f05 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -540,7 +540,7 @@
 
 #endif
 
-    u->store = (u->conf->store || u->conf->store_lengths);
+    u->store = u->conf->store;
 
     if (!u->store && !r->post_action && !u->conf->ignore_client_abort) {
         r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;