diff --git a/libguile/scmconfig.h.in b/libguile/scmconfig.h.in
index bce6490e2..3b7237162 100644
--- a/libguile/scmconfig.h.in
+++ b/libguile/scmconfig.h.in
@@ -49,6 +49,9 @@
    tzname.  */
 #undef HAVE_TZNAME
 
+/* Define as __inline if that's what the C compiler calls it.  */
+#undef inline
+
 /* Define if on MINIX.  */
 #undef _MINIX