diff --git a/src/st/st-theme-node-drawing.c b/src/st/st-theme-node-drawing.c
index cab254260..1ac3e39b4 100644
--- a/src/st/st-theme-node-drawing.c
+++ b/src/st/st-theme-node-drawing.c
@@ -1782,7 +1782,7 @@ st_theme_node_paint_sliced_border_image (StThemeNode           *node,
   cogl_set_source (material);
 
   {
-    GLfloat rectangles[] =
+    float rectangles[] =
     {
       /* top left corner */
       0, 0, border_left, border_top,