diff --git a/demos/c++/c.cpp b/demos/c++/c.cpp
index 28e4adca..90ceeb5d 100644
--- a/demos/c++/c.cpp
+++ b/demos/c++/c.cpp
@@ -1,7 +1,5 @@
 #include <iostream>
 
-extern void foo();
-
 int main() {
 	printf("%s\n", HELLO_WORLD);
 	return 0;