diff --git a/firmware/console/binary/tunerstudio_io.cpp b/firmware/console/binary/tunerstudio_io.cpp
index df4129d579..add73a304d 100644
--- a/firmware/console/binary/tunerstudio_io.cpp
+++ b/firmware/console/binary/tunerstudio_io.cpp
@@ -37,6 +37,8 @@ void TsChannelBase::copyAndWriteSmallCrcPacket(uint8_t responseCode, const uint8
 }
 
 void TsChannelBase::crcAndWriteBuffer(uint8_t responseCode, size_t size) {
+	efiAssertVoid(OBD_PCM_Processor_Fault, size <= BLOCKING_FACTOR + 7, "crcAndWriteBuffer tried to transmit too large a packet")
+
 	auto scratchBuffer = this->scratchBuffer;
 	// Index 0/1 = packet size (big endian)
 	*(uint16_t*)scratchBuffer = SWAP_UINT16(size + 1);