diff --git a/glances/glances.py b/glances/glances.py
index 209d65cf..01bb59c8 100755
--- a/glances/glances.py
+++ b/glances/glances.py
@@ -728,12 +728,12 @@ class GlancesStats:
             phymem = psutil.virtual_memory()
 
             # buffers and cached (Linux, BSD)
-            buffers = getattr(phymem, 'buffers', lambda: 0)
-            cached = getattr(phymem, 'cached', lambda: 0)
+            buffers = getattr(phymem, 'buffers', lambda: 0)()
+            cached = getattr(phymem, 'cached', lambda: 0)()
 
             # active and inactive not available on Windows
-            active = getattr(phymem, 'active', lambda: 0)
-            inactive = getattr(phymem, 'inactive', lambda: 0)
+            active = getattr(phymem, 'active', lambda: 0)()
+            inactive = getattr(phymem, 'inactive', lambda: 0)()
 
             # phymem free and usage
             total = phymem.total