diff --git a/src/http/modules/ngx_http_ssl_module.c b/src/http/modules/ngx_http_ssl_module.c
index d74d4609435..6fe5463dfbf 100644
--- a/src/http/modules/ngx_http_ssl_module.c
+++ b/src/http/modules/ngx_http_ssl_module.c
@@ -1093,7 +1093,7 @@ ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
                 len++;
             }
 
-            if (len == 0) {
+            if (len == 0 || j == value[i].len) {
                 goto invalid;
             }
 
@@ -1183,7 +1183,7 @@ ngx_http_ssl_ocsp_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
         len++;
     }
 
-    if (len == 0) {
+    if (len == 0 || j == value[1].len) {
         goto invalid;
     }
 
diff --git a/src/mail/ngx_mail_ssl_module.c b/src/mail/ngx_mail_ssl_module.c
index 2a1043e661e..b80a0ca808a 100644
--- a/src/mail/ngx_mail_ssl_module.c
+++ b/src/mail/ngx_mail_ssl_module.c
@@ -682,7 +682,7 @@ ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
                 len++;
             }
 
-            if (len == 0) {
+            if (len == 0 || j == value[i].len) {
                 goto invalid;
             }
 
diff --git a/src/stream/ngx_stream_ssl_module.c b/src/stream/ngx_stream_ssl_module.c
index c5308322ac5..105aa1178a0 100644
--- a/src/stream/ngx_stream_ssl_module.c
+++ b/src/stream/ngx_stream_ssl_module.c
@@ -1073,7 +1073,7 @@ ngx_stream_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
                 len++;
             }
 
-            if (len == 0) {
+            if (len == 0 || j == value[i].len) {
                 goto invalid;
             }