--- apps/ocsp.c
+++ apps/ocsp.c
@@ -33,6 +33,13 @@
 #include <openssl/x509v3.h>
 #include <openssl/rand.h>
 
+/* fork() breaks AppleTVOS, WatchOS, AppleTVSimulator and WatchSimulator */
+/* Users should configure with -DNO_FORK */
+#if defined(NO_FORK)
+# undef HAVE_FORK
+# define HAVE_FORK 0
+#endif
+
 #ifndef HAVE_FORK
 #if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS)
 # define HAVE_FORK 0
--- apps/speed.c
+++ apps/speed.c
@@ -99,6 +99,13 @@
 #endif
 #include <openssl/modes.h>
 
+/* fork() breaks AppleTVOS, WatchOS, AppleTVSimulator and WatchSimulator */
+/* Users should configure with -DNO_FORK */
+#if defined(NO_FORK)
+# undef HAVE_FORK
+# define HAVE_FORK 0
+#endif
+
 #ifndef HAVE_FORK
 # if defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_VXWORKS)
 #  define HAVE_FORK 0