thodg/cgminer

diff --git a/bitforce.c b/bitforce.c
index 63b7c89..4a3eaee 100644
--- a/bitforce.c
+++ b/bitforce.c
@@ -41,7 +41,7 @@ static int BFopen(const char *devpath)
 
 static int BFopen(const char *devpath)
 {
-	return open(devpath, O_CLOEXEC | O_NOCTTY);
+	return open(devpath, O_RDWR | O_CLOEXEC | O_NOCTTY);
 }
 
 #endif