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-rw-r--r--configure.ac3
1 files changed, 1 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac
index 052c39cf47..119323d169 100644
--- a/configure.ac
+++ b/configure.ac
@@ -183,8 +183,7 @@ AC_PROG_CC([cc gcc])
PHP_DETECT_ICC
PHP_DETECT_SUNCC
AC_PROG_CC_C_O
-dnl Change to AC_PROG_CC_STDC when we start requiring a post-2.13 autoconf
-dnl AC_PROG_CC_STDC
+AC_PROG_CC_C99
AC_PROG_CPP
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_LN_S