diff --git a/auto/lib/openssl/conf b/auto/lib/openssl/conf
index e7d3795..4fb52df 100644
--- a/auto/lib/openssl/conf
+++ b/auto/lib/openssl/conf
@@ -41,6 +41,7 @@ if [ $OPENSSL != NONE ]; then
             CORE_LIBS="$CORE_LIBS $OPENSSL/.openssl/lib/libssl.a"
             CORE_LIBS="$CORE_LIBS $OPENSSL/.openssl/lib/libcrypto.a"
             CORE_LIBS="$CORE_LIBS $NGX_LIBDL"
+            CORE_LIBS="$CORE_LIBS $NGX_LIBPTHREAD"
 
             if [ "$NGX_PLATFORM" = win32 ]; then
                 CORE_LIBS="$CORE_LIBS -lgdi32 -lcrypt32 -lws2_32"
@@ -59,7 +60,7 @@ else
         ngx_feature_run=no
         ngx_feature_incs="#include <openssl/ssl.h>"
         ngx_feature_path=
-        ngx_feature_libs="-lssl -lcrypto $NGX_LIBDL"
+        ngx_feature_libs="-lssl -lcrypto $NGX_LIBDL $NGX_LIBPTHREAD"
         ngx_feature_test="SSL_CTX_set_options(NULL, 0)"
         . auto/feature
 
@@ -71,11 +72,13 @@ else
             ngx_feature_path="/usr/local/include"
 
             if [ $NGX_RPATH = YES ]; then
-                ngx_feature_libs="-R/usr/local/lib -L/usr/local/lib -lssl -lcrypto $NGX_LIBDL"
+                ngx_feature_libs="-R/usr/local/lib -L/usr/local/lib -lssl -lcrypto"
             else
-                ngx_feature_libs="-L/usr/local/lib -lssl -lcrypto $NGX_LIBDL"
+                ngx_feature_libs="-L/usr/local/lib -lssl -lcrypto"
             fi
 
+            ngx_feature_libs="$ngx_feature_libs $NGX_LIBDL $NGX_LIBPTHREAD"
+
             . auto/feature
         fi
 
@@ -87,11 +90,13 @@ else
             ngx_feature_path="/usr/pkg/include"
 
             if [ $NGX_RPATH = YES ]; then
-                ngx_feature_libs="-R/usr/pkg/lib -L/usr/pkg/lib -lssl -lcrypto $NGX_LIBDL"
+                ngx_feature_libs="-R/usr/pkg/lib -L/usr/pkg/lib -lssl -lcrypto"
             else
-                ngx_feature_libs="-L/usr/pkg/lib -lssl -lcrypto $NGX_LIBDL"
+                ngx_feature_libs="-L/usr/pkg/lib -lssl -lcrypto"
             fi
 
+            ngx_feature_libs="$ngx_feature_libs $NGX_LIBDL $NGX_LIBPTHREAD"
+
             . auto/feature
         fi
 
@@ -103,11 +108,13 @@ else
             ngx_feature_path="/opt/local/include"
 
             if [ $NGX_RPATH = YES ]; then
-                ngx_feature_libs="-R/opt/local/lib -L/opt/local/lib -lssl -lcrypto $NGX_LIBDL"
+                ngx_feature_libs="-R/opt/local/lib -L/opt/local/lib -lssl -lcrypto"
             else
-                ngx_feature_libs="-L/opt/local/lib -lssl -lcrypto $NGX_LIBDL"
+                ngx_feature_libs="-L/opt/local/lib -lssl -lcrypto"
             fi
 
+            ngx_feature_libs="$ngx_feature_libs $NGX_LIBDL $NGX_LIBPTHREAD"
+
             . auto/feature
         fi
 
diff --git a/auto/lib/openssl/make b/auto/lib/openssl/make
index a6090c6..126a238 100644
--- a/auto/lib/openssl/make
+++ b/auto/lib/openssl/make
@@ -51,7 +51,7 @@ END
 $OPENSSL/.openssl/include/openssl/ssl.h:	$NGX_MAKEFILE
 	cd $OPENSSL \\
 	&& if [ -f Makefile ]; then \$(MAKE) clean; fi \\
-	&& ./config --prefix=$ngx_prefix no-shared $OPENSSL_OPT \\
+	&& ./config --prefix=$ngx_prefix no-shared no-threads $OPENSSL_OPT \\
 	&& \$(MAKE) \\
 	&& \$(MAKE) install_sw LIBDIR=lib
 
diff --git a/auto/threads b/auto/threads
index 381f07a..943127f 100644
--- a/auto/threads
+++ b/auto/threads
@@ -17,4 +17,5 @@ END
     CORE_DEPS="$CORE_DEPS $THREAD_POOL_DEPS"
     CORE_SRCS="$CORE_SRCS $THREAD_POOL_SRCS"
     CORE_LIBS="$CORE_LIBS -lpthread"
+    NGX_LIBPTHREAD="-lpthread"
 fi
diff --git a/auto/unix b/auto/unix
index 90b5894..43d3b25 100644
--- a/auto/unix
+++ b/auto/unix
@@ -901,6 +901,7 @@ if [ $ngx_found = no ]; then
 
     if [ $ngx_found = yes ]; then
         CORE_LIBS="$CORE_LIBS -lpthread"
+        NGX_LIBPTHREAD="-lpthread"
     fi
 fi
 
diff --git a/src/core/nginx.c b/src/core/nginx.c
index 3894c29..9fcb0eb 100644
--- a/src/core/nginx.c
+++ b/src/core/nginx.c
@@ -985,8 +985,8 @@ ngx_process_options(ngx_cycle_t *cycle)
          p--)
     {
         if (ngx_path_separator(*p)) {
-            cycle->conf_prefix.len = p - ngx_cycle->conf_file.data + 1;
-            cycle->conf_prefix.data = ngx_cycle->conf_file.data;
+            cycle->conf_prefix.len = p - cycle->conf_file.data + 1;
+            cycle->conf_prefix.data = cycle->conf_file.data;
             break;
         }
     }
diff --git a/src/http/modules/ngx_http_grpc_module.c b/src/http/modules/ngx_http_grpc_module.c
index b6be9b8..837ad9a 100644
--- a/src/http/modules/ngx_http_grpc_module.c
+++ b/src/http/modules/ngx_http_grpc_module.c
@@ -3212,7 +3212,7 @@ ngx_http_grpc_parse_rst_stream(ngx_http_request_t *r, ngx_http_grpc_ctx_t *ctx,
         switch (state) {
 
         case sw_start:
-            ctx->error = ch << 24;
+            ctx->error = (ngx_uint_t) ch << 24;
             state = sw_error_2;
             break;
 
@@ -3325,7 +3325,7 @@ ngx_http_grpc_parse_goaway(ngx_http_request_t *r, ngx_http_grpc_ctx_t *ctx,
             break;
 
         case sw_error:
-            ctx->error = ch << 24;
+            ctx->error = (ngx_uint_t) ch << 24;
             state = sw_error_2;
             break;
 
@@ -3555,7 +3555,7 @@ ngx_http_grpc_parse_settings(ngx_http_request_t *r, ngx_http_grpc_ctx_t *ctx,
             break;
 
         case sw_value:
-            ctx->setting_value = ch << 24;
+            ctx->setting_value = (ngx_uint_t) ch << 24;
             state = sw_value_2;
             break;