diff --git a/src/libstrongswan/plugins/pem/pem_plugin.c b/src/libstrongswan/plugins/pem/pem_plugin.c
index fca717a106..d102e15359 100644
--- a/src/libstrongswan/plugins/pem/pem_plugin.c
+++ b/src/libstrongswan/plugins/pem/pem_plugin.c
@@ -46,46 +46,63 @@ METHOD(plugin_t, get_features, int,
 		/* private key PEM decoding */
 		PLUGIN_REGISTER(PRIVKEY, pem_private_key_load, FALSE),
 			PLUGIN_PROVIDE(PRIVKEY, KEY_ANY),
+				PLUGIN_DEPENDS(PRIVKEY, KEY_ANY),
 				PLUGIN_DEPENDS(HASHER, HASH_MD5),
 		PLUGIN_REGISTER(PRIVKEY, pem_private_key_load, FALSE),
 			PLUGIN_PROVIDE(PRIVKEY, KEY_RSA),
+				PLUGIN_DEPENDS(PRIVKEY, KEY_RSA),
 				PLUGIN_DEPENDS(HASHER, HASH_MD5),
 		PLUGIN_REGISTER(PRIVKEY, pem_private_key_load, FALSE),
 			PLUGIN_PROVIDE(PRIVKEY, KEY_ECDSA),
+				PLUGIN_DEPENDS(PRIVKEY, KEY_ECDSA),
 				PLUGIN_DEPENDS(HASHER, HASH_MD5),
 		PLUGIN_REGISTER(PRIVKEY, pem_private_key_load, FALSE),
 			PLUGIN_PROVIDE(PRIVKEY, KEY_DSA),
+				PLUGIN_DEPENDS(PRIVKEY, KEY_DSA),
 				PLUGIN_DEPENDS(HASHER, HASH_MD5),
 
 		/* public key PEM decoding */
 		PLUGIN_REGISTER(PUBKEY, pem_public_key_load, FALSE),
 			PLUGIN_PROVIDE(PUBKEY, KEY_ANY),
+				PLUGIN_DEPENDS(PUBKEY, KEY_ANY),
 		PLUGIN_REGISTER(PUBKEY, pem_public_key_load, FALSE),
 			PLUGIN_PROVIDE(PUBKEY, KEY_RSA),
+				PLUGIN_DEPENDS(PUBKEY, KEY_RSA),
 		PLUGIN_REGISTER(PUBKEY, pem_public_key_load, FALSE),
 			PLUGIN_PROVIDE(PUBKEY, KEY_ECDSA),
+				PLUGIN_DEPENDS(PUBKEY, KEY_ECDSA),
 		PLUGIN_REGISTER(PUBKEY, pem_public_key_load, FALSE),
 			PLUGIN_PROVIDE(PUBKEY, KEY_DSA),
+				PLUGIN_DEPENDS(PUBKEY, KEY_DSA),
 
 		/* certificate PEM decoding */
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_ANY),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_ANY),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_X509),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_X509),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_X509_CRL),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_X509_CRL),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_X509_OCSP_REQUEST),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_X509_OCSP_REQUEST),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_X509_OCSP_RESPONSE),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_X509_OCSP_RESPONSE),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_X509_AC),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_X509_AC),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_PKCS10_REQUEST),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_PKCS10_REQUEST),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_TRUSTED_PUBKEY),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_TRUSTED_PUBKEY),
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),
 			PLUGIN_PROVIDE(CERT_DECODE, CERT_GPG),
+				PLUGIN_DEPENDS(CERT_DECODE, CERT_GPG),
 
 		/* pluto specific certificate formats */
 		PLUGIN_REGISTER(CERT_DECODE, pem_certificate_load, FALSE),