1 files changed, 1 insertions, 1 deletions
diff --git a/tools/slang-test/os.cpp b/tools/slang-test/os.cpp
index 4d5a49a9f..8cb49248c 100644
--- a/tools/slang-test/os.cpp
+++ b/tools/slang-test/os.cpp
@@ -185,7 +185,7 @@ static DWORD WINAPI osReaderThreadProc(LPVOID threadParam)
                 break;
             }
 
-            *writeCursor++ = c;
+            *writeCursor++ = (char)c;
         }
         bytesRead = (DWORD)(writeCursor - buffer);