X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/4e7ee01264c430b044fd81cbc79a09ee0348d018..29f20a41029cc5e36a8756ad8dfda64d0ed314ce:/src/src/osfunctions.h

diff --git a/src/src/osfunctions.h b/src/src/osfunctions.h
index 19b580860..a6cec0dc2 100644
--- a/src/src/osfunctions.h
+++ b/src/src/osfunctions.h
@@ -18,6 +18,11 @@ extern int           os_getloadavg(void);
 extern void          os_restarting_signal(int, void (*)(int));
 extern void          os_non_restarting_signal(int, void (*)(int));
 extern const char   *os_strexit(int);     /* char to match os_strsignal */
+
+/* When os_strsignal aliases to a system function, don't define an
+additional prototype */
+#ifndef os_strsignal
 extern const char   *os_strsignal(int);   /* char to match strsignal in some OS */
+#endif
 
 /* End of osfunctions.h */