diff --git a/tools/unix/generate_planet.sh b/tools/unix/generate_planet.sh
index 46ea416702..57da3c417b 100755
--- a/tools/unix/generate_planet.sh
+++ b/tools/unix/generate_planet.sh
@@ -250,7 +250,7 @@ if [ "$MODE" == "coast" ]; then
   done
   # make a working copy of generated coastlines file
   [ -n "$OPT_WORLD" ] && cp "$INTCOASTSDIR/WorldCoasts.mwm.tmp" "$INTDIR"
-  [ -n "$KEEP_INTDIR" ] && rm -r "$INTCOASTSDIR"
+  [ -z "$KEEP_INTDIR" ] && rm -r "$INTCOASTSDIR"
   MODE=inter
 fi
 
@@ -388,5 +388,5 @@ fi
 # Cleaning up temporary directories
 rm "$STATUS_FILE" "$OSRM_FLAG"
 mv "$TARGET"/*.mwm.osm2ft "$INTDIR"
-[ -n "$KEEP_INTDIR" ] && rm -r "$INTDIR"
+[ -z "$KEEP_INTDIR" ] && rm -r "$INTDIR"
 log "STATUS" "Done"
diff --git a/tools/unix/generate_planet_routing.sh b/tools/unix/generate_planet_routing.sh
index 901c56fce0..3a0d5b5582 100755
--- a/tools/unix/generate_planet_routing.sh
+++ b/tools/unix/generate_planet_routing.sh
@@ -83,7 +83,7 @@ elif [ "$1" == "prepare" ]; then
     "$OSRM_BUILD_PATH/osrm-prepare" --config "$PREPARE_CFG" --profile "$PROFILE" "$OSRM_FILE" -r "$RESTRICTIONS_FILE"
     "$OSRM_BUILD_PATH/osrm-mapsme" -i "$OSRM_FILE"
     if [ -s "$OSRM_FILE" ]; then
-      [ -n "$KEEP_INTDIR" ] && rm -f "$PBF"
+      [ -z "$KEEP_INTDIR" ] && rm -f "$PBF"
       ONE_OSRM_READY=1
     else
       echo "Failed to create $OSRM_FILE"
@@ -149,7 +149,7 @@ elif [ "$1" == "online" ]; then
   "$OSRM_BUILD_PATH/osrm-extract" --config "$EXTRACT_CFG" --profile "$PROFILE" "$PBF"
   "$OSRM_BUILD_PATH/osrm-prepare" --config "$PREPARE_CFG" --profile "$PROFILE" "$OSRM_FILE" -r "$RESTRICTIONS_FILE"
   if [ -s "$OSRM_FILE" ]; then
-     [ -n "$KEEP_INTDIR" ] && rm -f "$PBF"
+     [ -z "$KEEP_INTDIR" ] && rm -f "$PBF"
   else
       echo "Failed to create $OSRM_FILE"
   fi