diff --git a/src/jpeg/jmorecfg.h b/src/jpeg/jmorecfg.h
index 8275eb093f..54e85ec823 100644
--- a/src/jpeg/jmorecfg.h
+++ b/src/jpeg/jmorecfg.h
@@ -186,6 +186,16 @@ typedef unsigned int JDIMENSION;
  * or code profilers that require it.
  */
 
+#if defined(__VISAGECPP__)
+/* a function called through method pointers: */
+#define METHODDEF(type)		static type _Optlink
+/* a function used only in its module: */
+#define LOCAL(type)		static type _Optlink
+/* a function referenced thru EXTERNs: */
+#define GLOBAL(type)		type
+/* a reference to a GLOBAL function: */
+#define EXTERN(type)		extern type _Optlink
+#else
 /* a function called through method pointers: */
 #define METHODDEF(type)		static type
 /* a function used only in its module: */
@@ -194,6 +204,8 @@ typedef unsigned int JDIMENSION;
 #define GLOBAL(type)		type
 /* a reference to a GLOBAL function: */
 #define EXTERN(type)		extern type
+#endif
+
 
 
 /* This macro is used to declare a "method", that is, a function pointer.