diff --git a/openpgpsdk/src/openpgpsdk/openssl_crypto.c b/openpgpsdk/src/openpgpsdk/openssl_crypto.c
index 1d70ccac9..5cc8d33af 100644
--- a/openpgpsdk/src/openpgpsdk/openssl_crypto.c
+++ b/openpgpsdk/src/openpgpsdk/openssl_crypto.c
@@ -396,6 +396,8 @@ ops_boolean_t ops_dsa_verify(const unsigned char *hash,size_t hash_length,
 	 if(BN_num_bits(dsa->q) != 160)
 	 {
 		 fprintf(stderr,"(WW) ops_dsa_verify: openssl does only supports 'q' of 160 bits. Current is %d bits.\n",BN_num_bits(dsa->q)) ;
+		 osig->r=osig->s=NULL;
+		 DSA_SIG_free(osig);
 		 return ops_false ;
 	 }