diff --git a/src/os/unix/ngx_freebsd_sendfile_chain.c b/src/os/unix/ngx_freebsd_sendfile_chain.c
index 97f968c40..476eff332 100644
--- a/src/os/unix/ngx_freebsd_sendfile_chain.c
+++ b/src/os/unix/ngx_freebsd_sendfile_chain.c
@@ -154,7 +154,7 @@ ngx_freebsd_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
                     size = limit - send;
 
                     aligned = (cl->buf->file_pos + size + ngx_pagesize - 1)
-                                                      & ~(ngx_pagesize - 1);
+                               & ~((off_t) ngx_pagesize - 1);
 
                     if (aligned <= cl->buf->file_last) {
                         size = aligned - cl->buf->file_pos;
diff --git a/src/os/unix/ngx_linux_sendfile_chain.c b/src/os/unix/ngx_linux_sendfile_chain.c
index 1d602c886..eb15c7a5f 100644
--- a/src/os/unix/ngx_linux_sendfile_chain.c
+++ b/src/os/unix/ngx_linux_sendfile_chain.c
@@ -223,7 +223,7 @@ ngx_linux_sendfile_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
                     size = limit - send;
 
                     aligned = (cl->buf->file_pos + size + ngx_pagesize - 1)
-                                                      & ~(ngx_pagesize - 1);
+                               & ~((off_t) ngx_pagesize - 1);
 
                     if (aligned <= cl->buf->file_last) {
                         size = aligned - cl->buf->file_pos;
diff --git a/src/os/unix/ngx_solaris_sendfilev_chain.c b/src/os/unix/ngx_solaris_sendfilev_chain.c
index ebccae8fa..04e33666a 100644
--- a/src/os/unix/ngx_solaris_sendfilev_chain.c
+++ b/src/os/unix/ngx_solaris_sendfilev_chain.c
@@ -135,7 +135,7 @@ ngx_solaris_sendfilev_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit)
                     size = limit - send;
 
                     aligned = (cl->buf->file_pos + size + ngx_pagesize - 1)
-                                                      & ~(ngx_pagesize - 1);
+                               & ~((off_t) ngx_pagesize - 1);
 
                     if (aligned <= cl->buf->file_last) {
                         size = aligned - cl->buf->file_pos;