1 files changed, 0 insertions, 1 deletions

diff --git a/m4/mpc.m4 b/m4/mpc.m4
index 78a080e..4333c4d 100644
--- a/m4/mpc.m4
+++ b/m4/mpc.m4
@@ -102,7 +102,6 @@ AC_DEFUN([MPC_C_CHECK_WARNINGCFLAGS], [
       MPC_C_CHECK_FLAG(-Wall)
       MPC_C_CHECK_FLAG(-Wextra)
       MPC_C_CHECK_FLAG(-Wdeclaration-after-statement)
-      MPC_C_CHECK_FLAG(-Wundef)
       MPC_C_CHECK_FLAG(-Wshadow)
       MPC_C_CHECK_FLAG(-Wstrict-prototypes)
       MPC_C_CHECK_FLAG(-Wmissing-prototypes)