diff --git a/docs/manual/mod/mod_authn_socache.xml b/docs/manual/mod/mod_authn_socache.xml
index c9617a7366..9331dda6b5 100644
--- a/docs/manual/mod/mod_authn_socache.xml
+++ b/docs/manual/mod/mod_authn_socache.xml
@@ -120,7 +120,7 @@ the load on backends</description>
 <usage>
     <p>This is a server-wide setting to select a provider for the
     <a href="../socache.html">shared object cache</a>.
-    Values are "dbm", "dc", "mc", or "shmcb", each subject to the
+    Values are "dbm", "dc", "memcache", or "shmcb", each subject to the
     appropriate module being loaded.  If not set, your platform's
        default will be used.</p>
 </usage>
diff --git a/docs/manual/socache.xml b/docs/manual/socache.xml
index 9b07c681f3..8a7b7d1c0f 100644
--- a/docs/manual/socache.xml
+++ b/docs/manual/socache.xml
@@ -52,7 +52,7 @@
     <dt>"dc" (mod_socache_dc)</dt>
     <dd>This makes use of the <a href="http://www.distcache.org/">distcache</a>
     distributed session caching libraries.</dd>
-    <dt>"mc" (mod_socache_memcache)</dt>
+    <dt>"memcache" (mod_socache_memcache)</dt>
     <dd>This makes use of the <a href="http://memcached.org/">memcached</a>
     high-performance, distributed memory object caching system.</dd>
     <dt>"shmcb" (mod_socache_shmcb)</dt>
diff --git a/modules/cache/mod_socache_memcache.c b/modules/cache/mod_socache_memcache.c
index 1aa8b7d311..ccb1bde766 100644
--- a/modules/cache/mod_socache_memcache.c
+++ b/modules/cache/mod_socache_memcache.c
@@ -313,7 +313,7 @@ static const ap_socache_provider_t socache_mc = {
 static void register_hooks(apr_pool_t *p)
 {
 #ifdef HAVE_APU_MEMCACHE
-    ap_register_provider(p, AP_SOCACHE_PROVIDER_GROUP, "mc",
+    ap_register_provider(p, AP_SOCACHE_PROVIDER_GROUP, "memcache",
                          AP_SOCACHE_PROVIDER_VERSION,
                          &socache_mc);
 #endif
diff --git a/modules/cluster/mod_heartmonitor.c b/modules/cluster/mod_heartmonitor.c
index 036e49ca5e..46e687b089 100644
--- a/modules/cluster/mod_heartmonitor.c
+++ b/modules/cluster/mod_heartmonitor.c
@@ -681,10 +681,13 @@ static int hm_post_config(apr_pool_t *p, apr_pool_t *plog,
     if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_CONFIG) {
         /* this is the real thing */
         if (maxworkers) {
-            storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shared",
+            storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shm",
                                          AP_SLOTMEM_PROVIDER_VERSION);
             if (!storage) {
-                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, 0, s, "ap_lookup_provider %s failed", AP_SLOTMEM_PROVIDER_GROUP);
+                ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_EMERG, 0, s,
+                             "failed to lookup provider 'shm' for '%s', "
+                             "maybe you need to load mod_slotmem_shm?",
+                             AP_SLOTMEM_PROVIDER_GROUP);
                 return !OK;
             }
             storage->create(&slotmem, "mod_heartmonitor", sizeof(hm_slot_server_t), maxworkers, AP_SLOTMEM_TYPE_PREGRAB, p);
diff --git a/modules/proxy/balancers/mod_lbmethod_heartbeat.c b/modules/proxy/balancers/mod_lbmethod_heartbeat.c
index 94f23d0234..e0ff3ed5cd 100644
--- a/modules/proxy/balancers/mod_lbmethod_heartbeat.c
+++ b/modules/proxy/balancers/mod_lbmethod_heartbeat.c
@@ -371,10 +371,13 @@ static int lb_hb_init(apr_pool_t *p, apr_pool_t *plog,
     if (ap_state_query(AP_SQ_MAIN_STATE) == AP_SQ_MS_CREATE_PRE_CONFIG)
         return OK;
 
-    storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shared",
+    storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shm",
                                  AP_SLOTMEM_PROVIDER_VERSION);
     if (!storage) {
-        ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, s, "ap_lookup_provider %s failed", AP_SLOTMEM_PROVIDER_GROUP);
+        ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, s,
+                     "Failed to lookup provider 'shm' for '%s'. Maybe you "
+                     "need to load mod_slotmem_shm?",
+                     AP_SLOTMEM_PROVIDER_GROUP);
         return OK;
     }
 
diff --git a/modules/proxy/mod_proxy_balancer.c b/modules/proxy/mod_proxy_balancer.c
index 0bfa8a4ccc..1fb87f0c8e 100644
--- a/modules/proxy/mod_proxy_balancer.c
+++ b/modules/proxy/mod_proxy_balancer.c
@@ -716,11 +716,12 @@ static int balancer_post_config(apr_pool_t *pconf, apr_pool_t *plog,
     /*
      * Get slotmem setups
      */
-    storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shared",
+    storage = ap_lookup_provider(AP_SLOTMEM_PROVIDER_GROUP, "shm",
                                  AP_SLOTMEM_PROVIDER_VERSION);
     if (!storage) {
         ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01177)
-                     "ap_lookup_provider %s failed: is mod_slotmem_shm loaded??",
+                     "Failed to lookup provider 'shm' for '%s': is "
+                     "mod_slotmem_shm loaded??",
                      AP_SLOTMEM_PROVIDER_GROUP);
         return !OK;
     }
diff --git a/modules/slotmem/mod_slotmem_shm.c b/modules/slotmem/mod_slotmem_shm.c
index f82f63c18e..2faed759d4 100644
--- a/modules/slotmem/mod_slotmem_shm.c
+++ b/modules/slotmem/mod_slotmem_shm.c
@@ -657,7 +657,7 @@ static int pre_config(apr_pool_t *p, apr_pool_t *plog,
 static void ap_slotmem_shm_register_hook(apr_pool_t *p)
 {
     const ap_slotmem_provider_t *storage = slotmem_shm_getstorage();
-    ap_register_provider(p, AP_SLOTMEM_PROVIDER_GROUP, "shared",
+    ap_register_provider(p, AP_SLOTMEM_PROVIDER_GROUP, "shm",
                          AP_SLOTMEM_PROVIDER_VERSION, storage);
     ap_hook_post_config(post_config, NULL, NULL, APR_HOOK_LAST);
     ap_hook_pre_config(pre_config, NULL, NULL, APR_HOOK_MIDDLE);