diff --git a/i3bar/include/workspaces.h b/i3bar/include/workspaces.h
index 2055d8b8..6f5ca72b 100644
--- a/i3bar/include/workspaces.h
+++ b/i3bar/include/workspaces.h
@@ -21,7 +21,7 @@ TAILQ_HEAD(ws_head, i3_ws);
  * Start parsing the received json-string
  *
  */
-void parse_workspaces_json();
+void parse_workspaces_json(char *json);
 
 /*
  * free() all workspace data-structures
diff --git a/i3bar/include/xcb.h b/i3bar/include/xcb.h
index a7924291..531fdfe9 100644
--- a/i3bar/include/xcb.h
+++ b/i3bar/include/xcb.h
@@ -31,7 +31,7 @@ typedef struct xcb_colors_t xcb_colors_t;
  * Initialize xcb and use the specified fontname for text-rendering
  *
  */
-char *init_xcb();
+char *init_xcb(char *fontname);
 
 /*
  * Initialize the colors