diff --git a/doc/subframes/src/subframes_tutorial.cpp b/doc/subframes/src/subframes_tutorial.cpp
index 885d2218d..6dfd9c6be 100644
--- a/doc/subframes/src/subframes_tutorial.cpp
+++ b/doc/subframes/src/subframes_tutorial.cpp
@@ -247,7 +247,7 @@ int main(int argc, char** argv)
     std::cin >> character_input;
     if (character_input == 0)
     {
-      return true;
+      return 0;
     }
     else if (character_input == 1)
     {
@@ -394,4 +394,4 @@ int main(int argc, char** argv)
 // CALL_SUB_TUTORIAL quaternions1
 // CALL_SUB_TUTORIAL quaternions2
 //
-// END_TUTORIAL
\ No newline at end of file
+// END_TUTORIAL