--- configure.ac
+++ configure.ac
@@ -16,6 +16,7 @@ AC_SUBST(HUNSPELL_VERSION_MAJOR)
 AC_SUBST(HUNSPELL_VERSION_MINOR)
 
 # library version
+m4_pattern_allow([^LT_(CURRENT|REVISION|AGE)$])dnl
 LT_CURRENT=1
 LT_REVISION=0
 LT_AGE=0