1 files changed, 1 insertions, 1 deletions
diff --git a/perl.h b/perl.h
index a2aefa349e..63367e0cc1 100644
--- a/perl.h
+++ b/perl.h
@@ -113,7 +113,7 @@ register struct op *op asm(stringify(OP_IN_REGISTER));
 # define STANDARD_C 1
 #endif
 
-#if defined(__cplusplus) || defined(WIN32) || defined(__sgi)
+#if defined(__cplusplus) || defined(WIN32) || defined(__sgi) || defined(OS2)
 # define DONT_DECLARE_STD 1
 #endif