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-rw-r--r--fixincludes/configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/fixincludes/configure.ac b/fixincludes/configure.ac
index 2c488e70338..e7de7918267 100644
--- a/fixincludes/configure.ac
+++ b/fixincludes/configure.ac
@@ -6,6 +6,7 @@ AC_CONFIG_AUX_DIR(..)
m4_sinclude(../libtool.m4)
AC_CANONICAL_SYSTEM
AC_PROG_CC
+AC_USE_SYSTEM_EXTENSIONS
AC_PROG_SED
# Figure out what compiler warnings we can enable.