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-rw-r--r--lib/gs/examples/calc2.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/gs/examples/calc2.erl b/lib/gs/examples/calc2.erl
index d28780de01..9969a6c40f 100644
--- a/lib/gs/examples/calc2.erl
+++ b/lib/gs/examples/calc2.erl
@@ -54,7 +54,7 @@ calc() ->
calc_loop(Lbl,M,V,Op) ->
receive
- {gs,_,click,D,_} when integer(D) ->
+ {gs,_,click,D,_} when is_integer(D) ->
digit_press(Lbl,M,V*10+D,Op);
{gs,_,click,'C',_} ->
c(Lbl,M,V,Op);