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-rw-r--r--soxwrap/configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/soxwrap/configure.ac b/soxwrap/configure.ac
index a01d026..0e7a319 100644
--- a/soxwrap/configure.ac
+++ b/soxwrap/configure.ac
@@ -21,6 +21,7 @@ AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_LN_S
AC_PROG_CC
+AC_PROG_CC_C99
dnl Check for options