diff --git a/media/extractors/mp4/SampleTable.cpp b/media/extractors/mp4/SampleTable.cpp
index 9dddf2c..a4d3994 100644
--- a/media/extractors/mp4/SampleTable.cpp
+++ b/media/extractors/mp4/SampleTable.cpp
@@ -655,12 +655,13 @@
     }
 
     mSampleTimeEntries = new (std::nothrow) SampleTimeEntry[mNumSampleSizes];
-    memset(mSampleTimeEntries, 0, sizeof(SampleTimeEntry) * mNumSampleSizes);
+
     if (!mSampleTimeEntries) {
         ALOGE("Cannot allocate sample entry table with %llu entries.",
                 (unsigned long long)mNumSampleSizes);
         return;
     }
+    memset(mSampleTimeEntries, 0, sizeof(SampleTimeEntry) * mNumSampleSizes);
 
     uint32_t sampleIndex = 0;
     uint64_t sampleTime = 0;