diff --git a/src/libopensc/opensc-pkcs15.h b/src/libopensc/opensc-pkcs15.h
index 2307709b..571b5153 100644
--- a/src/libopensc/opensc-pkcs15.h
+++ b/src/libopensc/opensc-pkcs15.h
@@ -262,6 +262,7 @@ int sc_pkcs15_read_pubkey(struct sc_pkcs15_card *card,
 			  struct sc_pkcs15_pubkey_rsa **out);
 int sc_pkcs15_parse_pubkey_rsa(struct sc_context *ctx,
 	       		   struct sc_pkcs15_pubkey_rsa *pubkey);
+void sc_pkcs15_free_pubkey(struct sc_pkcs15_pubkey_rsa *pubkey);
 
 void sc_pkcs15_print_cert_info(const struct sc_pkcs15_cert_info *cert);
 int sc_pkcs15_read_certificate(struct sc_pkcs15_card *card,
diff --git a/src/libopensc/pkcs15-pubkey.c b/src/libopensc/pkcs15-pubkey.c
index 133dccf7..3cd22f60 100644
--- a/src/libopensc/pkcs15-pubkey.c
+++ b/src/libopensc/pkcs15-pubkey.c
@@ -231,3 +231,11 @@ sc_pkcs15_read_pubkey(struct sc_pkcs15_card *p15card,
 	*out = pubkey;
 	return 0;
 }
+
+void sc_pkcs15_free_pubkey(struct sc_pkcs15_pubkey_rsa *key)
+{
+	assert(key != NULL);
+	free(key->modulus);
+	free(key->data);
+	free(key);
+}
diff --git a/src/libopensc/pkcs15.h b/src/libopensc/pkcs15.h
index 2307709b..571b5153 100644
--- a/src/libopensc/pkcs15.h
+++ b/src/libopensc/pkcs15.h
@@ -262,6 +262,7 @@ int sc_pkcs15_read_pubkey(struct sc_pkcs15_card *card,
 			  struct sc_pkcs15_pubkey_rsa **out);
 int sc_pkcs15_parse_pubkey_rsa(struct sc_context *ctx,
 	       		   struct sc_pkcs15_pubkey_rsa *pubkey);
+void sc_pkcs15_free_pubkey(struct sc_pkcs15_pubkey_rsa *pubkey);
 
 void sc_pkcs15_print_cert_info(const struct sc_pkcs15_cert_info *cert);
 int sc_pkcs15_read_certificate(struct sc_pkcs15_card *card,