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-rw-r--r--sqwebmail/configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/sqwebmail/configure.ac b/sqwebmail/configure.ac
index c1be861..c222199 100644
--- a/sqwebmail/configure.ac
+++ b/sqwebmail/configure.ac
@@ -17,6 +17,7 @@ AC_PROG_MAKE_SET
dnl Checks for programs.
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CC
+AC_PROG_CC_C99
AC_LIBTOOL_DLOPEN
AM_PROG_LIBTOOL