--- code/trunk/pcre_study.c	2008/07/09 11:03:07	358
+++ code/trunk/pcre_study.c	2008/07/09 16:20:19	359
@@ -504,7 +504,7 @@
             NULL on error or if no optimization possible
 */
 
-PCRE_EXP_DEFN pcre_extra *
+PCRE_EXP_DEFN pcre_extra * PCRE_CALL_CONVENTION
 pcre_study(const pcre *external_re, int options, const char **errorptr)
 {
 uschar start_bits[32];