1 files changed, 3 insertions, 0 deletions

diff --git a/gui.rkt b/gui.rkt
index 661f138..ce12285 100644
--- a/gui.rkt
+++ b/gui.rkt
@@ -50,6 +50,7 @@
         (new button%
              [parent par]
              [label (~a lbl)]
+             [min-width 30]
              [callback
                (lambda (button event)
                  (send msg
@@ -73,6 +74,7 @@
       (new button%
            [parent top-op-panel]
            [label "←"]
+           [min-width 30]
            [callback
              (lambda (button event)
                (define str (send msg get-label))
@@ -82,6 +84,7 @@
       (new button%
            [parent bottom-op-panel]
            [label "="]
+           [min-width 30]
            [callback
              (lambda (button event)
                (define ^ expt)