diff --git a/configure.ac b/configure.ac
index ebf78c5..6aef785 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,14 +19,20 @@ PKG_CHECK_MODULES([LIBNFC], [libnfc >= $LIBNFC_REQUIRED_VERSION], [], [AC_MSG_ER
 PKG_CONFIG_REQUIRES="libnfc"
 AC_SUBST([PKG_CONFIG_REQUIRES])
 
+AC_C_INLINE
+
 # Checks for typedefs, structures, and compiler characteristics.
 AC_HEADER_STDBOOL
+AC_TYPE_SIZE_T
+AC_TYPE_UINT8_T
+AC_TYPE_UINT16_T
 AC_TYPE_UINT32_T
 AC_TYPE_UINT64_T
 
 # Checks for library functions.
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC
+AC_CHECK_FUNCS([memset])
 
 AC_CONFIG_FILES([Makefile
                  src/Makefile])