diff --git a/configure.in b/configure.in
index 3f872180..ea2c0370 100644
--- a/configure.in
+++ b/configure.in
@@ -61,5 +61,9 @@ else
   LIBS="$LIBS -l$libgmp"
 fi
 
+AC_CHECK_LIB(dl, dlopen, [
+  LIBS="$LIBS -ldl"
+])
+
 AC_OUTPUT([Makefile src/Makefile cipher/Makefile cipher/blowfish/Makefile
 doc/Makefile lib/Makefile m4/Makefile redhat/Makefile debian/Makefile])