diff --git a/check b/check
index 18cae754..3b484028 100755
--- a/check
+++ b/check
@@ -50,12 +50,6 @@ timestamp=${TIMESTAMP:=false}
 
 rm -f $tmp.list $tmp.tmp $tmp.grep $here/$iam.out $tmp.xlist
 
-# Autodetect fs type based on what's on $TEST_DEV
-if [ "$HOSTOS" == "Linux" ]; then
-    FSTYP=`blkid -c /dev/null -s TYPE -o value $TEST_DEV`
-fi
-export FSTYP
-
 # we need common.config
 if ! . ./common/config
 then
@@ -63,6 +57,12 @@ then
     exit 1
 fi
 
+# Autodetect fs type based on what's on $TEST_DEV
+if [ "$HOSTOS" == "Linux" ]; then
+    FSTYP=`blkid -c /dev/null -s TYPE -o value $TEST_DEV`
+fi
+export FSTYP
+
 SUPPORTED_TESTS="[0-9][0-9][0-9] [0-9][0-9][0-9][0-9]"
 SRC_GROUPS="generic shared"
 export SRC_DIR="tests"