diff --git a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
index c33bd3546aba9..aeaa18f554427 100644
--- a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
+++ b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
@@ -3984,7 +3984,7 @@ public class PhoneWindowManager implements WindowManagerPolicy {
                                 telephonyService.silenceRinger();
                             } else if ((mIncallPowerBehavior
                                     & Settings.Secure.INCALL_POWER_BUTTON_BEHAVIOR_HANGUP) != 0
-                                    && telephonyService.isOffhook()) {
+                                    && telephonyService.isOffhook() && isScreenOn) {
                                 // Otherwise, if "Power button ends call" is enabled,
                                 // the Power button will hang up any current active call.
                                 hungUp = telephonyService.endCall();