diff --git a/configure.ac b/configure.ac
index 90f4ab6..6b81ded 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl 
-AC_INIT(mod_gnutls, 0.5.8)
+AC_INIT(mod_gnutls, 0.5.9)
 OOO_CONFIG_NICE(config.nice)
 MOD_GNUTLS_VERSION=AC_PACKAGE_VERSION
 AC_PREREQ(2.53)
diff --git a/src/gnutls_cache.c b/src/gnutls_cache.c
index 3ca8cb5..2653b4e 100644
--- a/src/gnutls_cache.c
+++ b/src/gnutls_cache.c
@@ -456,12 +456,15 @@ static int dbm_cache_store(void* baton, gnutls_datum_t key,
     }
 
     rv = apr_dbm_store(dbm, dbmkey, dbmval);
-    
     if (rv != APR_SUCCESS) {
+        char err[128], *p;
+        
+        p = apr_dbm_geterror(dbm, NULL, err, sizeof(err));
+        
         ap_log_error(APLOG_MARK, APLOG_DEBUG, rv,
                      ctxt->c->base_server,
-                     "[gnutls_cache] error storing in cache '%s'",
-                     ctxt->sc->cache_config);
+                     "[gnutls_cache] error storing in cache '%s': %s",
+                     ctxt->sc->cache_config, p!=NULL?p:"unknown error");
         apr_dbm_close(dbm);
         apr_pool_destroy(spool);
         return -1;