diff --git a/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py b/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py
index 764c51789b..c358d7f0e3 100755
--- a/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py
@@ -1850,7 +1850,7 @@ class ModuleAutoGen(AutoGen):
         if lines:
             DependencyFileSet.update(lines)
 
-        # Caculate all above dependency files hash
+        # Calculate all above dependency files hash
         # Initialze hash object
         FileList = []
         m = hashlib.md5()
@@ -1905,7 +1905,7 @@ class ModuleAutoGen(AutoGen):
             DependencyFileSet.update(rt)
 
 
-        # Caculate all above dependency files hash
+        # Calculate all above dependency files hash
         # Initialze hash object
         FileList = []
         m = hashlib.md5()
diff --git a/BaseTools/Source/Python/Workspace/DscBuildData.py b/BaseTools/Source/Python/Workspace/DscBuildData.py
index 248c562956..014f6d0805 100644
--- a/BaseTools/Source/Python/Workspace/DscBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DscBuildData.py
@@ -1588,7 +1588,7 @@ class DscBuildData(PlatformBuildClassObject):
         S_pcd_set = DscBuildData.OverrideByFdf(S_pcd_set,self.WorkspaceDir)
         S_pcd_set = DscBuildData.OverrideByComm(S_pcd_set)
 
-        # Create a tool to caculate structure pcd value
+        # Create a tool to calculate structure pcd value
         Str_Pcd_Values = self.GenerateByteArrayValue(S_pcd_set)
 
         if Str_Pcd_Values: