diff --git a/contrib/ldapc++/configure.in b/contrib/ldapc++/configure.ac
similarity index 100%
rename from contrib/ldapc++/configure.in
rename to contrib/ldapc++/configure.ac
diff --git a/contrib/ldaptcl/configure.in b/contrib/ldaptcl/configure.ac
similarity index 100%
rename from contrib/ldaptcl/configure.in
rename to contrib/ldaptcl/configure.ac