diff --git a/src/wimax/model/snr-to-block-error-rate-manager.cc b/src/wimax/model/snr-to-block-error-rate-manager.cc
index 41ff60942..ec340211e 100644
--- a/src/wimax/model/snr-to-block-error-rate-manager.cc
+++ b/src/wimax/model/snr-to-block-error-rate-manager.cc
@@ -24,6 +24,7 @@
 #include "ns3/snr-to-block-error-rate-record.h"
 #include "default-traces.h"
 #include "ns3/log.h"
+#include "ns3/assert.h"
 #include <fstream>
 
 NS_LOG_COMPONENT_DEFINE ("SNRToBlockErrorRateManager");
@@ -273,6 +274,8 @@ SNRToBlockErrorRateManager::ReLoadTraces (void)
 void
 SNRToBlockErrorRateManager::SetTraceFilePath (char *traceFilePath)
 {
+  NS_ASSERT_MSG (std::strlen (traceFilePath) < TRACE_FILE_PATH_SIZE,
+                 "char * traceFilePath too long");
   std::strcpy (m_traceFilePath, traceFilePath);
 }
 
diff --git a/src/wimax/model/snr-to-block-error-rate-manager.h b/src/wimax/model/snr-to-block-error-rate-manager.h
index e3e6915a5..8201a8be8 100644
--- a/src/wimax/model/snr-to-block-error-rate-manager.h
+++ b/src/wimax/model/snr-to-block-error-rate-manager.h
@@ -94,7 +94,8 @@ private:
   void ClearRecords (void);
   double m_speed; // in m/s
   uint8_t m_activateLoss;
-  char m_traceFilePath[1024];
+  static const unsigned int TRACE_FILE_PATH_SIZE = 1024;
+  char m_traceFilePath[TRACE_FILE_PATH_SIZE];
 
   std::vector<SNRToBlockErrorRateRecord *> * m_recordModulation[7];