diff --git a/src/core/ngx_string.c b/src/core/ngx_string.c
index d73cb86..e73dc41 100644
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -87,7 +87,7 @@
  *
  *  reserved:
  *    %t                        ptrdiff_t
- *    %S                        null-teminated wchar string
+ *    %S                        null-terminated wchar string
  *    %C                        wchar
  */
 
diff --git a/src/os/unix/ngx_process.c b/src/os/unix/ngx_process.c
index 7446c13..c480d68 100644
--- a/src/os/unix/ngx_process.c
+++ b/src/os/unix/ngx_process.c
@@ -359,6 +359,7 @@
             break;
 
         case SIGALRM:
+            ngx_sigalrm = 1;
             break;
 
         case SIGIO:
diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index 92f6bf6..1ee278f 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -34,6 +34,7 @@
 
 sig_atomic_t  ngx_reap;
 sig_atomic_t  ngx_sigio;
+sig_atomic_t  ngx_sigalrm;
 sig_atomic_t  ngx_terminate;
 sig_atomic_t  ngx_quit;
 sig_atomic_t  ngx_debug_quit;
@@ -130,10 +131,13 @@
 
     for ( ;; ) {
         if (delay) {
-            delay *= 2;
+            if (ngx_sigalrm) {
+                delay *= 2;
+                ngx_sigalrm = 0;
+            }
 
             ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
-                           "temination cycle: %d", delay);
+                           "termination cycle: %d", delay);
 
             itv.it_interval.tv_sec = 0;
             itv.it_interval.tv_usec = 0;
@@ -492,8 +496,7 @@
         if (kill(ngx_processes[i].pid, signo) == -1) {
             err = ngx_errno;
             ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
-                          "kill(%P, %d) failed",
-                          ngx_processes[i].pid, signo);
+                          "kill(%P, %d) failed", ngx_processes[i].pid, signo);
 
             if (err == NGX_ESRCH) {
                 ngx_processes[i].exited = 1;
diff --git a/src/os/unix/ngx_process_cycle.h b/src/os/unix/ngx_process_cycle.h
index c52b6f0..9bf0474 100644
--- a/src/os/unix/ngx_process_cycle.h
+++ b/src/os/unix/ngx_process_cycle.h
@@ -39,6 +39,7 @@
 
 extern sig_atomic_t    ngx_reap;
 extern sig_atomic_t    ngx_sigio;
+extern sig_atomic_t    ngx_sigalrm;
 extern sig_atomic_t    ngx_quit;
 extern sig_atomic_t    ngx_debug_quit;
 extern sig_atomic_t    ngx_terminate;