diff --git a/configure.ac b/configure.ac
index 2b7ec65c..5c754b8f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,7 @@ AC_CONFIG_HEADERS([config.h])
 # Checks for programs.
 AC_PROG_CXX
 AC_PROG_CC
+AM_PROG_CC_C_O
 m4_ifdef([LT_INIT], [], [AC_PROG_LIBTOOL])
 AC_PROG_RANLIB