diff --git a/src/os/unix/ngx_shmem.h b/src/os/unix/ngx_shmem.h
index 72c54f166..85ef019b7 100644
--- a/src/os/unix/ngx_shmem.h
+++ b/src/os/unix/ngx_shmem.h
@@ -4,8 +4,8 @@
  */
 
 
-#ifndef _NGX_SHARED_H_INCLUDED_
-#define _NGX_SHARED_H_INCLUDED_
+#ifndef _NGX_SHMEM_H_INCLUDED_
+#define _NGX_SHMEM_H_INCLUDED_
 
 
 #include <ngx_config.h>
@@ -23,4 +23,4 @@ ngx_int_t ngx_shm_alloc(ngx_shm_t *shm);
 void ngx_shm_free(ngx_shm_t *shm);
 
 
-#endif /* _NGX_SHARED_H_INCLUDED_ */
+#endif /* _NGX_SHMEM_H_INCLUDED_ */
diff --git a/src/os/win32/ngx_shmem.h b/src/os/win32/ngx_shmem.h
index fe3e71df6..d1fe8f83f 100644
--- a/src/os/win32/ngx_shmem.h
+++ b/src/os/win32/ngx_shmem.h
@@ -4,8 +4,8 @@
  */
 
 
-#ifndef _NGX_SHARED_H_INCLUDED_
-#define _NGX_SHARED_H_INCLUDED_
+#ifndef _NGX_SHMEM_H_INCLUDED_
+#define _NGX_SHMEM_H_INCLUDED_
 
 
 #include <ngx_config.h>
@@ -24,4 +24,4 @@ ngx_int_t ngx_shm_alloc(ngx_shm_t *shm);
 void ngx_shm_free(ngx_shm_t *shm);
 
 
-#endif /* _NGX_SHARED_H_INCLUDED_ */
+#endif /* _NGX_SHMEM_H_INCLUDED_ */