diff --git a/configure.ac b/configure.ac
index 7a694a20..4ac7ac82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -283,7 +283,7 @@ case "${host}" in
 	abi="elf"
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
 	;;
-  *-*-openbsd*)
+  *-*-openbsd*|*-*-bitrig*)
 	CFLAGS="$CFLAGS"
 	abi="elf"
 	AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])