diff --git a/src/openssl-engine.hxx b/src/openssl-engine.hxx
index 8bf6390..c96a7ee 100644
--- a/src/openssl-engine.hxx
+++ b/src/openssl-engine.hxx
@@ -79,7 +79,9 @@ namespace openssl {
       }
       virtual ~Engine() {
         OPENSSL_LOG("log");
-        OPENSSL_CHECK(ENGINE_free(_e));
+        // removed EngineMapper::destroy because of crash:
+        // https://dev.marc.waeckerlin.org/projects/libpcscxx/ticket/25
+        //OPENSSL_CHECK(ENGINE_free(_e));
       }
       virtual const char* id() = 0;
       virtual const char* name() = 0;