diff --git a/src/core/ngx_open_file_cache.c b/src/core/ngx_open_file_cache.c
index c44ac96..b72af5e 100644
--- a/src/core/ngx_open_file_cache.c
+++ b/src/core/ngx_open_file_cache.c
@@ -124,7 +124,7 @@
 
     if (cache->current) {
         ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
-                      "%d items still leave in open file cache",
+                      "%ui items still leave in open file cache",
                       cache->current);
     }
 
diff --git a/src/event/modules/ngx_devpoll_module.c b/src/event/modules/ngx_devpoll_module.c
index 6fdd002..0506103 100644
--- a/src/event/modules/ngx_devpoll_module.c
+++ b/src/event/modules/ngx_devpoll_module.c
@@ -425,7 +425,7 @@
 
             case -1:
                 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
-                    "ioctl(DP_ISPOLLED) failed for socket %d, event",
+                    "ioctl(DP_ISPOLLED) failed for socket %d, event %04Xd",
                     fd, revents);
                 break;
 
@@ -449,7 +449,7 @@
                     != (ssize_t) sizeof(struct pollfd))
                 {
                     ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
-                                  "write(/dev/poll) for %d failed, fd");
+                                  "write(/dev/poll) for %d failed", fd);
                 }
 
                 if (close(fd) == -1) {
diff --git a/src/http/ngx_http_special_response.c b/src/http/ngx_http_special_response.c
index 875c24d..5464005 100644
--- a/src/http/ngx_http_special_response.c
+++ b/src/http/ngx_http_special_response.c
@@ -370,7 +370,7 @@
     ngx_http_core_loc_conf_t  *clcf;
 
     ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http special response: %d, \"%V?%V\"",
+                   "http special response: %i, \"%V?%V\"",
                    error, &r->uri, &r->args);
 
     r->err_status = error;
diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index b4f8eeb..4138bda 100644
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -487,7 +487,7 @@
 
     if (cmcf->variables.nelts <= index) {
         ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
-                      "unknown variable index: %d", index);
+                      "unknown variable index: %ui", index);
         return NULL;
     }
 
diff --git a/src/os/unix/ngx_channel.c b/src/os/unix/ngx_channel.c
index 536a9ed..8e90696 100644
--- a/src/os/unix/ngx_channel.c
+++ b/src/os/unix/ngx_channel.c
@@ -144,7 +144,7 @@
 
     if ((size_t) n < sizeof(ngx_channel_t)) {
         ngx_log_error(NGX_LOG_ALERT, log, 0,
-                      "recvmsg() returned not enough data: %uz", n);
+                      "recvmsg() returned not enough data: %z", n);
         return NGX_ERROR;
     }