diff --git a/guiheader.py b/guiheader.py
index 81a70d8..3349047 100644
--- a/guiheader.py
+++ b/guiheader.py
@@ -570,13 +570,13 @@ class GUIHeader(QWidget):
         for key, pf in self.pframe_matrix["PRE-PIF"][3].items():
             pf.setStyleSheet("background-color:{0};".format(color))
 
-        amd2 = self.cafe.getCache("AMD2:SOL:2")
+        val_amd2 = self.cafe.getCache("AMD2:SOL:2")
         
-        if amd2 is not None and amd2 > 0.0:
+        if val_amd2 is not None and val_amd2 > 0.0:
             color = "green"
         else:
             color = self.pf_bgcolor()
-                  
+
         for i in range(5, 8):
             pf = self.pframe_matrix["O2"][5][i]
             pf.setStyleSheet("background-color:{0};".format(color))