diff --git a/coreapi/linphonecore_jni.cc b/coreapi/linphonecore_jni.cc
index 91984104e..74a076936 100644
--- a/coreapi/linphonecore_jni.cc
+++ b/coreapi/linphonecore_jni.cc
@@ -1208,3 +1208,21 @@ extern "C" void Java_org_linphone_core_LinphoneCoreImpl_enableIpv6(JNIEnv* env,j
               ,jlong lc, jboolean enable) {
               linphone_core_enable_ipv6((LinphoneCore*)lc,enable);
 }
+
+extern "C" void Java_org_linphone_core_LinphoneCoreImpl_adjustSoftwareVolume(JNIEnv* env,jobject  thiz
+              ,jlong ptr, jint db) {
+	LinphoneCore *lc = (LinphoneCore *) ptr;
+              
+	if (db == 0) {
+       	linphone_core_set_playback_gain_db(lc, 0);
+       	return;
+	}
+              
+    float gain = linphone_core_get_playback_gain_db(lc) + db;
+    if (gain > 0) gain = 0;
+
+	linphone_core_set_playback_gain_db(lc, gain);
+}
+
+
+
diff --git a/java/common/org/linphone/core/LinphoneCore.java b/java/common/org/linphone/core/LinphoneCore.java
index 7ce7f0dbe..328ef8c87 100644
--- a/java/common/org/linphone/core/LinphoneCore.java
+++ b/java/common/org/linphone/core/LinphoneCore.java
@@ -555,4 +555,5 @@ public interface LinphoneCore {
 	void startEchoCalibration(Object data) throws LinphoneCoreException;
 
 	void enableIpv6(boolean enable);
+	void adjustSoftwareVolume(int i);
 }