diff --git a/src/core/Guard.cpp b/src/core/Guard.cpp
index 4a775b0c2f..316a97c600 100644
--- a/src/core/Guard.cpp
+++ b/src/core/Guard.cpp
@@ -30,6 +30,15 @@
 extern "C"
 {
     #include "../openrct2.h"
+
+    void openrct2_assert(bool expression, const char * message, ...)
+    {
+        va_list args;
+        va_start(args, message);
+        Guard::Assert_VA(expression, message, args);
+        va_end(args);
+    }
+
 }
 
 namespace Guard
diff --git a/src/openrct2.h b/src/openrct2.h
index c140013f32..7f2bdb5bcf 100644
--- a/src/openrct2.h
+++ b/src/openrct2.h
@@ -52,6 +52,7 @@ void openrct2_dispose();
 void openrct2_finish();
 void openrct2_reset_object_tween_locations();
 bool openrct2_setup_rct2_segment();
+void openrct2_assert(bool expression, const char * message, ...);
 
 int cmdline_run(const char **argv, int argc);