diff --git a/1993/plummer/try.alt.sh b/1993/plummer/try.alt.sh
index 9c4f532fe..5a68767cb 100755
--- a/1993/plummer/try.alt.sh
+++ b/1993/plummer/try.alt.sh
@@ -12,9 +12,7 @@ fi
 
 # let user change the sleep duration if they wish
 #
-if [[ -z "$SLEEP" ]]; then
-    SLEEP=1000
-fi
+[[ -z "$SLEEP" ]] && SLEEP=1000
 
 # let user change the number if they wish to
 #
diff --git a/1993/plummer/try.sh b/1993/plummer/try.sh
index e1dde1689..73f2edd83 100755
--- a/1993/plummer/try.sh
+++ b/1993/plummer/try.sh
@@ -26,7 +26,7 @@ else
     ARG="$2"
 fi
 
-make CC="$CC" SLEEP="$SLEEP" all >/dev/null || exit 1
+make CC="$CC" all >/dev/null || exit 1
 
 # clear screen after compilation so that only the entry is shown
 clear