diff --git a/third_party/machinarium/sources/machinarium.h b/third_party/machinarium/sources/machinarium.h
index 47a7ef24..60592c16 100644
--- a/third_party/machinarium/sources/machinarium.h
+++ b/third_party/machinarium/sources/machinarium.h
@@ -7,8 +7,6 @@
  * cooperative multitasking engine.
 */
 
-#include <openssl/ssl.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif