diff --git a/src/mod/endpoints/mod_opal/mod_opal.cpp b/src/mod/endpoints/mod_opal/mod_opal.cpp
old mode 100644
new mode 100755
index 6f0fb3addd..7d97c29b51
--- a/src/mod/endpoints/mod_opal/mod_opal.cpp
+++ b/src/mod/endpoints/mod_opal/mod_opal.cpp
@@ -1031,7 +1031,7 @@ switch_status_t FSConnection::receive_message(switch_core_session_message_t *msg
       {
         PTRACE(2, "mod_opal\tRequesting switch to T.38");
         PSafePtr<OpalConnection> other = GetOtherPartyConnection();
-        if (other != NULL && other->SwitchT38(true))
+        if (other != NULL && other->SwitchFaxMediaStreams(true))
             switch_channel_set_flag(m_fsChannel, CF_REQ_MEDIA);
         else {
             PTRACE(1, "mod_opal\tMode change request to T.38 failed");
diff --git a/src/mod/endpoints/mod_opal/mod_opal.h b/src/mod/endpoints/mod_opal/mod_opal.h
old mode 100644
new mode 100755
index 7b3993b0b2..4b0cd62a02
--- a/src/mod/endpoints/mod_opal/mod_opal.h
+++ b/src/mod/endpoints/mod_opal/mod_opal.h
@@ -32,13 +32,17 @@
 #endif
 
 #include <ptlib.h>
+#include <opal/manager.h>
 
-#if !defined(PTLIB_CHECK_VERSION)
-  #error PTLib is too old to use, must be >= 2.10.6
+#ifndef OPAL_CHECK_VERSION
+  #define OPAL_CHECK_VERSION(a,b,c) 0
 #endif
 
-#include <opal/manager.h>
-#include <opal/localep.h>
+#if !OPAL_CHECK_VERSION(3,12,8)
+  #error OPAL is too old to use, must be >= 2.12.8
+#endif
+
+#include <ep/localep.h>
 #include <h323/h323ep.h>
 #include <iax2/iax2ep.h>
 
@@ -53,11 +57,8 @@
 
 #define MODNAME "mod_opal"
 
-#ifndef OPAL_CHECK_VERSION
-  #define OPAL_CHECK_VERSION(a,b,c) 0
-#endif
+#define HAVE_T38 OPAL_T38_CAPABILITY
 
-#define HAVE_T38 (OPAL_CHECK_VERSION(3,11,2) && OPAL_T38_CAPABILITY)
 
 
 class FSEndPoint;