diff --git a/media/libstagefright/rtsp/AAMRAssembler.cpp b/media/libstagefright/rtsp/AAMRAssembler.cpp
index fb8abc5..9e8725a 100644
--- a/media/libstagefright/rtsp/AAMRAssembler.cpp
+++ b/media/libstagefright/rtsp/AAMRAssembler.cpp
@@ -145,7 +145,6 @@
 
     unsigned payloadHeader = buffer->data()[0];
     unsigned CMR = payloadHeader >> 4;
-    CHECK_EQ(payloadHeader & 0x0f, 0u);  // RR
 
     Vector<uint8_t> tableOfContents;
 
diff --git a/media/libstagefright/rtsp/AH263Assembler.cpp b/media/libstagefright/rtsp/AH263Assembler.cpp
index d0313cc..75cd911 100644
--- a/media/libstagefright/rtsp/AH263Assembler.cpp
+++ b/media/libstagefright/rtsp/AH263Assembler.cpp
@@ -13,6 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+//#define LOG_NDEBUG 0
+#define LOG_TAG "AH263Assembler"
+#include <utils/Log.h>
 
 #include "AH263Assembler.h"
 
@@ -100,11 +103,34 @@
     }
 
     unsigned payloadHeader = U16_AT(buffer->data());
-    CHECK_EQ(payloadHeader >> 11, 0u);  // RR=0
     unsigned P = (payloadHeader >> 10) & 1;
     unsigned V = (payloadHeader >> 9) & 1;
     unsigned PLEN = (payloadHeader >> 3) & 0x3f;
-    // unsigned PEBIT = payloadHeader & 7;
+    unsigned PEBIT = payloadHeader & 7;
+
+    // V=0
+    if (V != 0u) {
+        queue->erase(queue->begin());
+        ++mNextExpectedSeqNo;
+        ALOGW("Packet discarded due to VRC (V != 0)");
+        return MALFORMED_PACKET;
+    }
+
+    // PLEN=0
+    if (PLEN != 0u) {
+        queue->erase(queue->begin());
+        ++mNextExpectedSeqNo;
+        ALOGW("Packet discarded (PLEN != 0)");
+        return MALFORMED_PACKET;
+    }
+
+    // PEBIT=0
+    if (PEBIT != 0u) {
+        queue->erase(queue->begin());
+        ++mNextExpectedSeqNo;
+        ALOGW("Packet discarded (PEBIT != 0)");
+        return MALFORMED_PACKET;
+    }
 
     size_t skip = V + PLEN + (P ? 0 : 2);