diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 38bf95633..3c52de846 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -1873,7 +1873,7 @@ dns_error_name:
     ngx_log_error(r->log_level, r->log, 0,
                   "DNS error (%ui: %s), query id:%ui, name:\"%*s\"",
                   code, ngx_resolver_strerror(code), ident,
-                  rn->nlen, rn->name);
+                  (size_t) rn->nlen, rn->name);
     return;
 
 dns_error:
diff --git a/src/http/modules/ngx_http_mp4_module.c b/src/http/modules/ngx_http_mp4_module.c
index 04bf9c1bc..6cb3ccfaa 100644
--- a/src/http/modules/ngx_http_mp4_module.c
+++ b/src/http/modules/ngx_http_mp4_module.c
@@ -913,7 +913,7 @@ ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
 
         ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
                        "mp4 atom: %*s @%O:%uL",
-                       4, atom_name, mp4->offset, atom_size);
+                       (size_t) 4, atom_name, mp4->offset, atom_size);
 
         if (atom_size > (uint64_t) (NGX_MAX_OFF_T_VALUE - mp4->offset)
             || mp4->offset + (off_t) atom_size > end)
@@ -1958,7 +1958,7 @@ ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
     ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
                    "stsd entries:%uD, media:%*s",
                    ngx_mp4_get_32value(stsd_atom->entries),
-                   4, stsd_atom->media_name);
+                   (size_t) 4, stsd_atom->media_name);
 
     trak = ngx_mp4_last_trak(mp4);
 
diff --git a/src/http/modules/ngx_http_ssl_module.c b/src/http/modules/ngx_http_ssl_module.c
index 778bc9320..12da4f200 100644
--- a/src/http/modules/ngx_http_ssl_module.c
+++ b/src/http/modules/ngx_http_ssl_module.c
@@ -338,7 +338,8 @@ ngx_http_ssl_alpn_select(ngx_ssl_conn_t *ssl_conn, const unsigned char **out,
 #if (NGX_DEBUG)
     for (i = 0; i < inlen; i += in[i] + 1) {
         ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                       "SSL ALPN supported by client: %*s", in[i], &in[i + 1]);
+                       "SSL ALPN supported by client: %*s",
+                       (size_t) in[i], &in[i + 1]);
     }
 #endif
 
@@ -365,7 +366,7 @@ ngx_http_ssl_alpn_select(ngx_ssl_conn_t *ssl_conn, const unsigned char **out,
     }
 
     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                   "SSL ALPN selected: %*s", *outlen, *out);
+                   "SSL ALPN selected: %*s", (size_t) *outlen, *out);
 
     return SSL_TLSEXT_ERR_OK;
 }
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 7a126bd84..bd36aeccc 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -1597,7 +1597,8 @@ ngx_http_core_find_static_location(ngx_http_request_t *r,
         }
 
         ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "test location: \"%*s\"", node->len, node->name);
+                       "test location: \"%*s\"",
+                       (size_t) node->len, node->name);
 
         n = (len <= (size_t) node->len) ? len : node->len;
 
diff --git a/src/http/ngx_http_file_cache.c b/src/http/ngx_http_file_cache.c
index 3561028f0..37cd377d0 100644
--- a/src/http/ngx_http_file_cache.c
+++ b/src/http/ngx_http_file_cache.c
@@ -1834,7 +1834,7 @@ ngx_http_file_cache_expire(ngx_http_file_cache_t *cache)
 
         ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
                       "ignore long locked inactive cache entry %*s, count:%d",
-                      2 * NGX_HTTP_CACHE_KEY_LEN, key, fcn->count);
+                      (size_t) 2 * NGX_HTTP_CACHE_KEY_LEN, key, fcn->count);
     }
 
     ngx_shmtx_unlock(&cache->shpool->mutex);
diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index eaf294a12..f8271ab6d 100644
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -2428,9 +2428,8 @@ ngx_http_regex_exec(ngx_http_request_t *r, ngx_http_regex_t *re, ngx_str_t *s)
 
         v = cmcf->variables.elts;
 
-        ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http regex set $%V to \"%*s\"",
-                       &v[index].name, vv->len, vv->data);
+        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                       "http regex set $%V to \"%v\"", &v[index].name, vv);
         }
 #endif
     }