diff --git a/libi3/dpi.c b/libi3/dpi.c
index c015065b..5fd4cbca 100644
--- a/libi3/dpi.c
+++ b/libi3/dpi.c
@@ -10,7 +10,7 @@ extern xcb_screen_t *root_screen;
  *
  */
 int logical_px(const int logical) {
-    const double dpi = (double)root_screen->height_in_pixels * 25.4 /
-                       (double)root_screen->height_in_millimeters;
+    const int dpi = (double)root_screen->height_in_pixels * 25.4 /
+                    (double)root_screen->height_in_millimeters;
 	return ceil((dpi / 96.0) * logical);
 }