diff --git a/linux-user/signal.c b/linux-user/signal.c
index 46abf53d89..0d2e301878 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -152,7 +152,7 @@ void target_to_host_sigset(sigset_t *d, const target_sigset_t *s)
         ((unsigned long *)d)[i] = tswapl(s->sig[i]);
     }
 #elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2
-    ((unsigned long *)d)[0] = sigmask | (tswapl(s->sig[1]) << 32);
+    ((unsigned long *)d)[0] = sigmask | ((unsigned long)tswapl(s->sig[1]) << 32);
 #else
 #error target_to_host_sigset
 #endif /* TARGET_LONG_BITS */
diff --git a/vl.h b/vl.h
index 669bd227e6..531eabe02d 100644
--- a/vl.h
+++ b/vl.h
@@ -60,7 +60,7 @@ int bdrv_commit(BlockDriverState *bs);
 
 struct cow_header_v2 {
     uint32_t magic;
-    uint32_t  long version;
+    uint32_t version;
     char backing_file[1024];
     int32_t mtime;
     uint64_t size;