diff --git a/src/libsysprof-gtk/sysprof-line-layer.h b/src/libsysprof-gtk/sysprof-line-layer.h
index 8736684a..e1f79522 100644
--- a/src/libsysprof-gtk/sysprof-line-layer.h
+++ b/src/libsysprof-gtk/sysprof-line-layer.h
@@ -29,6 +29,7 @@ G_BEGIN_DECLS
 
 #define SYSPROF_TYPE_LINE_LAYER (sysprof_line_layer_get_type())
 
+SYSPROF_AVAILABLE_IN_ALL
 G_DECLARE_FINAL_TYPE (SysprofLineLayer, sysprof_line_layer, SYSPROF, LINE_LAYER, SysprofChartLayer)
 
 SYSPROF_AVAILABLE_IN_ALL