diff --git a/terminal.c b/terminal.c
index 676f0cb4..a9c98ed5 100644
--- a/terminal.c
+++ b/terminal.c
@@ -608,6 +608,15 @@ err_sem_destroy:
     return false;
 }
 
+static int
+pt_or_px_as_pixels(const struct terminal *term,
+                        const union pt_or_px *pt_or_px)
+{
+    return pt_or_px->px == 0
+        ? pt_or_px->pt * term->font_dpi / 72
+        : pt_or_px->px;
+}
+
 static bool
 term_set_fonts(struct terminal *term, struct fcft_font *fonts[static 4])
 {