diff --git a/configure.ac b/configure.ac
index 1c0e82e0..40fcea7c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -97,7 +97,7 @@ AS_IF([test "x$enable_mu4e" != "xno"], [
   ])
   AS_CASE([$emacs_version],
     [*25.3*],[build_mu4e=yes],
-    [*26*|*27*|*28*],[build_mu4e=yes],
+    [*26*|*27*|*28*|*29*],[build_mu4e=yes],
     [AC_WARN([emacs is too old to build mu4e (need emacs >= 25.3)])])
 ])
 AM_CONDITIONAL(BUILD_MU4E, test "x$build_mu4e" = "xyes")