diff --git a/workflows/pca_workflow.py b/workflows/pca_workflow.py
index 56b3fc0..4664d9f 100644
--- a/workflows/pca_workflow.py
+++ b/workflows/pca_workflow.py
@@ -1,18 +1,19 @@
 import gtk
 import logger
-from workflow import *
+import workflow as wf
+from workflow import Stage, Function
 import pickle
 from scipy import log2,transpose,dot,divide,shape,mean,resize,zeros
 from scipy.linalg import svd,inv,norm,get_blas_funcs,eig
 import plots
 import dataset
 
-class PCAWorkflow(Workflow):
+class PCAWorkflow(wf.Workflow):
     name = 'PCA Workflow'
     description = 'PCA workflow. Uses real microarray data from a study of diabetes (Mootha et al.).'
 
     def __init__(self, app):
-        Workflow.__init__(self, app)
+        wf.Workflow.__init__(self, app)
         #self.add_project(app.project)
         #logger.log('notice','Current project added to: %s' %self.name)