diff --git a/native/jni/src/proximity_info_state.cpp b/native/jni/src/proximity_info_state.cpp
index b9fce5f..c5f2884 100644
--- a/native/jni/src/proximity_info_state.cpp
+++ b/native/jni/src/proximity_info_state.cpp
@@ -464,8 +464,8 @@
 }
 
 int ProximityInfoState::getDuration(const int index) const {
-    if (mInputSize > 0 && index > 0 && index < mInputSize - 1) {
-        return mTimes[index + 1] - mTimes[index - 1];
+    if (mInputSize > 0 && index >= 0 && index < mInputSize - 1) {
+        return mTimes[index + 1] - mTimes[index];
     }
     return 0;
 }