1 files changed, 1 insertions, 1 deletions
diff --git a/perl.h b/perl.h
index 87f52785ca..89e0a126e5 100644
--- a/perl.h
+++ b/perl.h
@@ -254,7 +254,7 @@ register struct op *Perl_op asm(stringify(OP_IN_REGISTER));
 
 #if defined(HASVOLATILE) || defined(STANDARD_C)
 #   ifdef __cplusplus
-#	define VOL		// to temporarily suppress warnings
+#	define VOL		/* to temporarily suppress warnings */
 #   else
 #	define VOL volatile
 #   endif