diff --git a/configure.ac b/configure.ac
index d8e9a91f..bec90f80 100644
--- a/configure.ac
+++ b/configure.ac
@@ -276,6 +276,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 
+AC_C_INLINE
 AC_C_BIGENDIAN(
   AC_DEFINE(NATIVE_BIG_ENDIAN, 1, [machine is bigendian]),
   AC_DEFINE(NATIVE_LITTLE_ENDIAN, 1, [machine is littleendian]),