diff --git a/academic/chemtool/chemtool.SlackBuild b/academic/chemtool/chemtool.SlackBuild
index f0f8eeb22a..7a6b54df91 100644
--- a/academic/chemtool/chemtool.SlackBuild
+++ b/academic/chemtool/chemtool.SlackBuild
@@ -30,10 +30,10 @@ TAG=${TAG:-_SBo}
 # Automatically determine the architecture we're building on:
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
-    i?86) export ARCH=i486 ;;
-    arm*) export ARCH=arm ;;
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
     # Unless $ARCH is already set, use uname -m for all other archs:
-       *) export ARCH=$( uname -m ) ;;
+       *) ARCH=$( uname -m ) ;;
   esac
 fi