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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 9aadc73e..1bb64fc7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -416,7 +416,7 @@ AC_ARG_ENABLE(sna,
[SNA="$enableval"],
[SNA=auto])
-AC_CHECK_HEADERS([dev/wscons/wsconsio.h])
+AC_CHECK_HEADERS([dev/wscons/wsconsio.h alloca.h])
if test "x$SNA" != "xno"; then
AC_DEFINE(USE_SNA, 1, [Enable SNA support])