1 files changed, 5 insertions, 0 deletions

diff --git a/src/s/aix3-2.h b/src/s/aix3-2.h
index 2073ccf928d..9866ea9dbda 100644
--- a/src/s/aix3-2.h
+++ b/src/s/aix3-2.h
@@ -47,3 +47,8 @@
    the internationalization code causes the modifier keys C, M and Shift
    to beep after a mouse click.  */
 #define X11R5_INHIBIT_I18N
+
+/* string.h defines rindex as a macro, at least with native cc, so we
+   lose declaring char * rindex without this.
+   It is just a guess which versions of AIX need this definition.  */
+#undef HAVE_STRING_H