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-rw-r--r--libical/configure.in2
1 files changed, 2 insertions, 0 deletions
diff --git a/libical/configure.in b/libical/configure.in
index 02275e8d74..df2850e84d 100644
--- a/libical/configure.in
+++ b/libical/configure.in
@@ -1,4 +1,6 @@
dnl Process this file with autoconf to produce a configure script.
+AC_PREREQ(2.52)
+
AC_INIT(src)
AM_INIT_AUTOMAKE(libical-evolution,0.23a)
AM_CONFIG_HEADER(config.h)