diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 453dd01e732dd2af6a0a729f7634c5957bad342d..6298c5562e732b6f8ef12d20e14f987567f27665 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -450,6 +450,7 @@ dnl This sometimes fails to find confdefs.h, for some reason.
 dnl [#]line __oline__ "[$]0"
 [#]line __oline__ "configure"
 #include "confdefs.h"
+[$3]
 
 /* The worlds most stringent C compiler? */
 #ifdef __TenDRA__