diff --git a/configure.ac b/configure.ac
index 93da2a2..eede711 100644
--- a/configure.ac
+++ b/configure.ac
@@ -125,11 +125,7 @@ AS_IF([test "x$enable_pthread" != xno],
 
 
 
-AC_SUBST(CC)
-AC_SUBST(AR)
 AC_SUBST(WINDRES)
-AC_SUBST(CFLAGS)
-AC_SUBST(LDFLAGS)
 AC_SUBST(N2N_LIBS_EXTRA)
 AC_SUBST(TOOLS_ADDITIONAL)
 AC_CONFIG_HEADERS(include/config.h)