diff --git a/src/os/unix/ngx_errno.c b/src/os/unix/ngx_errno.c
index 2faf63a..0c93d23 100644
--- a/src/os/unix/ngx_errno.c
+++ b/src/os/unix/ngx_errno.c
@@ -8,7 +8,7 @@
 #include <ngx_core.h>
 
 
-#if (HAVE_STRERROR_R)
+#if (NGX_STRERROR_R)
 
 ngx_int_t ngx_strerror_r(int err, char *errstr, size_t size)
 {
@@ -31,7 +31,7 @@
     return len;
 }
 
-#elif (HAVE_GNU_STRERROR_R)
+#elif (NGX_GNU_STRERROR_R)
 
 /* Linux strerror_r() */
 
diff --git a/src/os/unix/ngx_errno.h b/src/os/unix/ngx_errno.h
index 7218bb2..cc9b1d1 100644
--- a/src/os/unix/ngx_errno.h
+++ b/src/os/unix/ngx_errno.h
@@ -51,6 +51,8 @@
 
 #else
 
+/* Solaris has threads-safe strerror() */
+
 #define ngx_strerror_r(err, errstr, size)  \
              (char *) ngx_cpystrn(errstr, strerror(err), size) - (errstr)
 
diff --git a/src/os/unix/ngx_files.c b/src/os/unix/ngx_files.c
index f2ba3a4..da75ba0 100644
--- a/src/os/unix/ngx_files.c
+++ b/src/os/unix/ngx_files.c
@@ -15,7 +15,7 @@
     ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
                    "read: %d, %X, %d, " OFF_T_FMT, file->fd, buf, size, offset);
 
-#if (HAVE_PREAD)
+#if (NGX_PREAD)
 
     n = pread(file->fd, buf, size, offset);
 
@@ -57,7 +57,7 @@
 {
     ssize_t n;
 
-#if (HAVE_PWRITE)
+#if (NGX_PWRITE)
 
     n = pwrite(file->fd, buf, size, offset);
 
@@ -206,7 +206,7 @@
         return NGX_ERROR;
     }
 
-    dir->info_valid = 0;
+    dir->valid_info = 0;
 
     return NGX_OK;
 }
diff --git a/src/os/unix/ngx_files.h b/src/os/unix/ngx_files.h
index 06c22f5..b789d61 100644
--- a/src/os/unix/ngx_files.h
+++ b/src/os/unix/ngx_files.h
@@ -98,7 +98,7 @@
 #define ngx_delete_dir_n         "rmdir()"
 
 
-#define ngx_de_name(dir)         (dir)->de->d_name
+#define ngx_de_name(dir)         ((u_char *) (dir)->de->d_name)
 #if (NGX_FREEBSD)
 #define ngx_de_namelen(dir)      (dir)->de->d_namlen
 #else
diff --git a/src/os/unix/ngx_types.h b/src/os/unix/ngx_types.h
index 49fb17d..870c414 100644
--- a/src/os/unix/ngx_types.h
+++ b/src/os/unix/ngx_types.h
@@ -19,7 +19,8 @@
     DIR              *dir;
     struct dirent    *de;
     struct stat       info;
-    unsigned          info_valid;
+
+    ngx_uint_t        valid_info:1;  /* unsigned  valid_info:1; */
 } ngx_dir_t;