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-rw-r--r--arch/um/os-Linux/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 3bd10deea28..09251338d99 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -171,7 +171,7 @@ int os_sigio_async(int master, int slave)
flags = fcntl(master, F_GETFL);
if(flags < 0)
- return errno;
+ return -errno;
if((fcntl(master, F_SETFL, flags | O_NONBLOCK | O_ASYNC) < 0) ||
(fcntl(master, F_SETOWN, os_getpid()) < 0))