diff --git a/src/main/java/io/bitsquare/app/gui/BitsquareApp.java b/src/main/java/io/bitsquare/app/gui/BitsquareApp.java
index c03fe0cb42..1160edffce 100644
--- a/src/main/java/io/bitsquare/app/gui/BitsquareApp.java
+++ b/src/main/java/io/bitsquare/app/gui/BitsquareApp.java
@@ -27,7 +27,6 @@ import io.bitsquare.gui.util.ImageUtil;
 import io.bitsquare.persistence.Persistence;
 import io.bitsquare.user.User;
 
-import com.google.common.base.Preconditions;
 import com.google.common.base.Throwables;
 
 import com.google.inject.Guice;
@@ -47,6 +46,7 @@ import javafx.stage.Stage;
 
 import org.springframework.core.env.Environment;
 
+import static com.google.common.base.Preconditions.checkNotNull;
 import static io.bitsquare.app.BitsquareEnvironment.*;
 
 public class BitsquareApp extends Application {
@@ -61,8 +61,7 @@ public class BitsquareApp extends Application {
 
     @Override
     public void start(Stage primaryStage) throws IOException {
-        Preconditions.checkArgument(env != null, "Environment must not be null");
-
+        checkNotNull(env, "Environment must not be null");
         bitsquareAppModule = new BitsquareAppModule(env, primaryStage);
         injector = Guice.createInjector(bitsquareAppModule);