diff --git a/projects/clr/rocclr/utils/flags.cpp b/projects/clr/rocclr/utils/flags.cpp
index f68bc2a76c..31f8237888 100644
--- a/projects/clr/rocclr/utils/flags.cpp
+++ b/projects/clr/rocclr/utils/flags.cpp
@@ -152,7 +152,7 @@ bool Flag::init() {
     if (!flagIsDefault(AMD_LOG_LEVEL_FILE)) {
       std::string fileName = AMD_LOG_LEVEL_FILE;
       fileName = fileName + "_" + std::to_string(Os::getProcessId());
-      outFile = fopen(fileName.c_str(), "w");
+      outFile = fopen(fileName.c_str(), "a");
     }
   }