diff --git a/radiomics/shape2D.py b/radiomics/shape2D.py
index a99ca019..9598b6fd 100644
--- a/radiomics/shape2D.py
+++ b/radiomics/shape2D.py
@@ -219,7 +219,7 @@ def getSphericalDisproportionFeatureValue(self):
 
   def getMaximumDiameterFeatureValue(self):
     r"""
-    **7. Maximum 3D diameter**
+    **7. Maximum 2D diameter**
 
     Maximum diameter is defined as the largest pairwise Euclidean distance between tumor surface mesh
     vertices.