diff --git a/lib/call-session.js b/lib/call-session.js
index b9bf5f1..62c572e 100644
--- a/lib/call-session.js
+++ b/lib/call-session.js
@@ -559,7 +559,7 @@ class CallSession extends Emitter {
                 ...this.rtpEngineOpts.uas.mediaOpts,
                 'from-tag': this.rtpEngineOpts.uas.tag,
                 'to-tag': this.rtpEngineOpts.uac.tag,
-                flags: ['single codec', 'inject DTMF'],
+                flags: ['single codec'],
                 sdp
               };
               const response = await this.answer(opts);
diff --git a/lib/utils.js b/lib/utils.js
index 37887ea..5d8c623 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -19,8 +19,8 @@ function makeRtpEngineOpts(req, srcIsUsingSrtp, dstIsUsingSrtp, padCrypto, teams
   const dstOpts = dstIsUsingSrtp ? srtpOpts : rtpCopy;
   const srcOpts = srcIsUsingSrtp ? srtpOpts : rtpCopy;
 
-  /** Allow feature server to send DTMF to the call excepts call from/to teams */
-  if (!teams) {
+  /** Allow rtpengine to inject DTMF on calls from webrtc only (this disables kernel forwarding) */
+  if (!teams && (dstIsUsingSrtp || process.env.JAMBONES_RTPENGINE_INJECT_DTMF_ALWAYS)) {
     if (!dstOpts.flags.includes('inject DTMF')) {
       dstOpts.flags.push('inject DTMF');
     }