diff --git a/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/hsa.cpp b/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/hsa.cpp
index 0c55e38105..71e1b86dd8 100644
--- a/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/hsa.cpp
+++ b/projects/rocr-runtime/runtime/hsa-runtime/core/runtime/hsa.cpp
@@ -376,7 +376,7 @@ static size_t get_extension_table_length(uint16_t extension, uint16_t major, uin
       return 0;
   }
 
-  char buff[3];
+  char buff[6];
   sprintf(buff, "%02u", minor);
   name += std::to_string(major) + "_" + buff + "_pfn_t";