diff --git a/include/con.h b/include/con.h
index 93497404..e029fd54 100644
--- a/include/con.h
+++ b/include/con.h
@@ -72,7 +72,7 @@ Con *con_inside_floating(Con *con);
  * Checks if the given container is inside a focused container.
  *
  */
-Con *con_inside_focused(Con *con);
+bool con_inside_focused(Con *con);
 
 /**
  * Returns the container with the given client window ID or NULL if no such
diff --git a/src/con.c b/src/con.c
index 9cef302f..cd7c2ce0 100644
--- a/src/con.c
+++ b/src/con.c
@@ -362,7 +362,7 @@ Con *con_inside_floating(Con *con) {
  * Checks if the given container is inside a focused container.
  *
  */
-Con *con_inside_focused(Con *con) {
+bool con_inside_focused(Con *con) {
     if (con == focused)
         return true;
     if (!con->parent)