diff --git a/services/audiopolicy/engine/common/include/ProductStrategy.h b/services/audiopolicy/engine/common/include/ProductStrategy.h
index 8162720..9b1125d 100644
--- a/services/audiopolicy/engine/common/include/ProductStrategy.h
+++ b/services/audiopolicy/engine/common/include/ProductStrategy.h
@@ -92,6 +92,10 @@
 
     bool isDefault() const;
 
+    bool isPatchStrategy() const {
+        return getVolumeGroupForStreamType(AUDIO_STREAM_PATCH) != VOLUME_GROUP_NONE;
+    }
+
     void dump(String8 *dst, int spaces = 0) const;
 
 private:
diff --git a/services/audiopolicy/engine/common/src/EngineBase.cpp b/services/audiopolicy/engine/common/src/EngineBase.cpp
index 976791f..fb8379e 100644
--- a/services/audiopolicy/engine/common/src/EngineBase.cpp
+++ b/services/audiopolicy/engine/common/src/EngineBase.cpp
@@ -311,6 +311,9 @@
     }
     StrategyVector orderedStrategies;
     for (const auto &iter : strategies) {
+        if (iter.second->isPatchStrategy()) {
+            continue;
+        }
         orderedStrategies.push_back(iter.second->getId());
     }
     return orderedStrategies;
@@ -742,6 +745,9 @@
     auto defaultDevices = DeviceVector(getApmObserver()->getDefaultOutputDevice());
     for (const auto &iter : getProductStrategies()) {
         const auto &strategy = iter.second;
+        if (strategy->isPatchStrategy()) {
+            continue;
+        }
         mDevicesForStrategies[strategy->getId()] = defaultDevices;
         setStrategyDevices(strategy, defaultDevices);
     }
@@ -750,6 +756,9 @@
 void EngineBase::updateDeviceSelectionCache() {
     for (const auto &iter : getProductStrategies()) {
         const auto& strategy = iter.second;
+        if (strategy->isPatchStrategy()) {
+            continue;
+        }
         auto devices = getDevicesForProductStrategy(strategy->getId());
         mDevicesForStrategies[strategy->getId()] = devices;
         setStrategyDevices(strategy, devices);
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 3ec3fb3..354c59c 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -3496,6 +3496,11 @@
     }
     ALOGV("%s: group %d matching with %s index %d",
             __FUNCTION__, group, toString(attributes).c_str(), index);
+    if (mEngine->getStreamTypeForAttributes(attributes) == AUDIO_STREAM_PATCH) {
+        ALOGV("%s: cannot change volume for PATCH stream, attrs: %s",
+                __FUNCTION__, toString(attributes).c_str());
+        return NO_ERROR;
+    }
     status_t status = NO_ERROR;
     IVolumeCurves &curves = getVolumeCurves(attributes);
     VolumeSource vs = toVolumeSource(group);