--- origsrc/crypto/dllmain.c
+++ src/crypto/dllmain.c
@@ -35,7 +35,9 @@
     case DLL_THREAD_ATTACH:
         break;
     case DLL_THREAD_DETACH:
+# ifndef __CYGWIN__
         OPENSSL_thread_stop();
+# endif
         break;
     case DLL_PROCESS_DETACH:
         break;
--- origsrc/providers/fips/self_test.c
+++ src/providers/fips/self_test.c
@@ -95,7 +95,9 @@
         init();
         break;
     case DLL_PROCESS_DETACH:
+# ifndef __CYGWIN__
         cleanup();
+# endif
         break;
     default:
         break;