diff --git a/srpt/README b/srpt/README
index 03d496bca..924f18110 100644
--- a/srpt/README
+++ b/srpt/README
@@ -74,10 +74,11 @@ The ib_srpt kernel module supports the following parameters:
   to 65536 bytes, which is sufficient to use the full bandwidth of low-latency
   HCAs. Increasing this value may decrease latency for applications
   transferring large amounts of data at once.
-* srpt_autodetect_cred_req (y or n, default y)
+* srpt_autodetect_cred_req (y or n, default n)
   Whether or not to autodetect initiator support for SRP_CRED_REQ (initiators
   with Linux kernel 2.6.37 or later only).  The use of SRP_CRED_REQ allows
   ib_srpt to process workloads with large I/O depths more efficiently.
+  Note: enabling this mode causes the Windows SRP initiator to stop working.
 * srpt_srq_size (number, default 4095)
   ib_srpt uses a shared receive queue (SRQ) for processing incoming SRP
   requests. This number may have to be increased when a large number of
diff --git a/srpt/src/ib_srpt.c b/srpt/src/ib_srpt.c
index 96809fc81..902b13d98 100644
--- a/srpt/src/ib_srpt.c
+++ b/srpt/src/ib_srpt.c
@@ -130,11 +130,12 @@ module_param(srpt_sq_size, int, 0444);
 MODULE_PARM_DESC(srpt_sq_size,
 		 "Per-channel send queue (SQ) size.");
 
-#if defined(RHEL_MAJOR) && RHEL_MAJOR -0 <= 5
-static int srpt_autodetect_cred_req = true;
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 27) \
+    || defined(RHEL_MAJOR) && RHEL_MAJOR -0 <= 5
+static int srpt_autodetect_cred_req;
 module_param(srpt_autodetect_cred_req, int, 0444);
 #else
-static bool srpt_autodetect_cred_req = true;
+static bool srpt_autodetect_cred_req;
 module_param(srpt_autodetect_cred_req, bool, 0444);
 #endif
 MODULE_PARM_DESC(srpt_autodetect_cred_req,