diff --git a/m4/slibtool.m4 b/m4/slibtool.m4
index 6b7b680..1f2c857 100644
--- a/m4/slibtool.m4
+++ b/m4/slibtool.m4
@@ -518,9 +518,11 @@ _SLIBTOOL_ARG_WITH([sysroot],[absolute path to the target's sysroot],[slibtool_s
 # --------------------
 slibtool_set_flavor
 LIBTOOL='$(SLIBTOOL)'
+SLIBTOOL="${SLIBTOOL} \$(SLIBTOOL_FLAGS)"
 
 AC_SUBST([LIBTOOL])
 AC_SUBST([SLIBTOOL])
+AC_SUBST([SLIBTOOL_FLAGS])
 AC_SUBST([SLIBTOOL_SYSROOT])
 ])