diff --git a/src/pkcs11/Makefile.am b/src/pkcs11/Makefile.am
index 4f0c31b4..aa012a06 100644
--- a/src/pkcs11/Makefile.am
+++ b/src/pkcs11/Makefile.am
@@ -31,7 +31,7 @@ libpkcs11_la_LIBADD =
 
 pkcs11_spy_la_SOURCES = pkcs11-spy.c pkcs11-display.c pkcs11-display.h
 pkcs11_spy_la_LDFLAGS = -module -avoid-version
-pkcs11_spy_la_LIBADD = @LIBOPENSC@ @OPENSSL_LIBS@ libpkcs11.la
+pkcs11_spy_la_LIBADD = @LIBOPENSC@ @OPENSSL_LIBS@ libpkcs11.la @LIBLTDL@
 
 include_HEADERS = pkcs11.h