fix C++ comments
diff --git a/agent/snmpd.c b/agent/snmpd.c
index 5574b7d..0deff09 100644
--- a/agent/snmpd.c
+++ b/agent/snmpd.c
@@ -1001,8 +1001,8 @@
                 fclose(PID);
             }
 #ifndef _MSC_VER
-            // The sequence open()/fdopen()/fclose()/close() makes MSVC crash,
-            // hence skip the close() call when using the MSVC runtime.
+            /* The sequence open()/fdopen()/fclose()/close() makes MSVC crash,
+               hence skip the close() call when using the MSVC runtime. */
             close(fd);
 #endif
         }