diff --git a52dec/configure.in a52dec/configure.in
index 71fd92b..46e1d3d 100644
--- a52dec/configure.in
+++ a52dec/configure.in
@@ -85,7 +85,6 @@ AC_CHECK_GENERATE_INTTYPES([include])
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
-AC_C_ALWAYS_INLINE
 AC_C_RESTRICT
 AC_TYPE_SIZE_T
 AC_C_BIGENDIAN