diff --git a/gcc/config/alpha/vms.h b/gcc/config/alpha/vms.h
index 59ac57bbbe6..559a1ff0be8 100644
--- a/gcc/config/alpha/vms.h
+++ b/gcc/config/alpha/vms.h
@@ -323,6 +323,8 @@ void *function_arg ();
 #define DBX_DEBUGGING_INFO
 #endif
 
+#define DWARF2_DEBUGGING_INFO
+
 #ifdef PREFERRED_DEBUGGING_TYPE
 #undef PREFERRED_DEBUGGING_TYPE
 #endif