diff --git a/cells/tap/sky130_fd_sc_hdll__tap_1.lef b/cells/tap/sky130_fd_sc_hdll__tap_1.lef
index 62a0513..6724ffe 100644
--- a/cells/tap/sky130_fd_sc_hdll__tap_1.lef
+++ b/cells/tap/sky130_fd_sc_hdll__tap_1.lef
@@ -24,7 +24,7 @@
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tap_1
   ORIGIN  0.000000  0.000000 ;
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   SYMMETRY X Y R90 ;
   SIZE  0.460000 BY  2.720000 ;
   SITE unithd ;
diff --git a/cells/tap/sky130_fd_sc_hdll__tap_1.magic.lef b/cells/tap/sky130_fd_sc_hdll__tap_1.magic.lef
index 5458b59..1fe5b30 100644
--- a/cells/tap/sky130_fd_sc_hdll__tap_1.magic.lef
+++ b/cells/tap/sky130_fd_sc_hdll__tap_1.magic.lef
@@ -28,7 +28,7 @@
   MACRO originalViewName STRING ;
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tap_1
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   FOREIGN sky130_fd_sc_hdll__tap_1 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  0.460000 BY  2.720000 ;
diff --git a/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.lef b/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.lef
index 1c6670c..4b64995 100644
--- a/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.lef
+++ b/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.lef
@@ -24,7 +24,7 @@
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tapvgnd_1
   ORIGIN  0.000000  0.000000 ;
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   SYMMETRY X Y R90 ;
   SIZE  0.460000 BY  2.720000 ;
   SITE unithd ;
diff --git a/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.magic.lef b/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.magic.lef
index 9580419..57e9726 100644
--- a/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.magic.lef
+++ b/cells/tapvgnd/sky130_fd_sc_hdll__tapvgnd_1.magic.lef
@@ -28,7 +28,7 @@
   MACRO originalViewName STRING ;
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tapvgnd_1
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   FOREIGN sky130_fd_sc_hdll__tapvgnd_1 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  0.460000 BY  2.720000 ;
diff --git a/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.lef b/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.lef
index 6bb744f..f597ef5 100644
--- a/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.lef
+++ b/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.lef
@@ -24,7 +24,7 @@
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tapvgnd2_1
   ORIGIN  0.000000  0.000000 ;
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   SYMMETRY X Y R90 ;
   SIZE  0.460000 BY  2.720000 ;
   SITE unithd ;
diff --git a/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.magic.lef b/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.magic.lef
index 7f357e3..df5c4e2 100644
--- a/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.magic.lef
+++ b/cells/tapvgnd2/sky130_fd_sc_hdll__tapvgnd2_1.magic.lef
@@ -28,7 +28,7 @@
   MACRO originalViewName STRING ;
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tapvgnd2_1
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   FOREIGN sky130_fd_sc_hdll__tapvgnd2_1 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  0.460000 BY  2.720000 ;
diff --git a/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.lef b/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.lef
index 6085ce0..9e0fcf4 100644
--- a/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.lef
+++ b/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.lef
@@ -24,7 +24,7 @@
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tapvpwrvgnd_1
   ORIGIN  0.000000  0.000000 ;
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   SYMMETRY X Y R90 ;
   SIZE  0.460000 BY  2.720000 ;
   SITE unithd ;
diff --git a/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.magic.lef b/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.magic.lef
index 2fce030..7dd2cde 100644
--- a/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.magic.lef
+++ b/cells/tapvpwrvgnd/sky130_fd_sc_hdll__tapvpwrvgnd_1.magic.lef
@@ -28,7 +28,7 @@
   MACRO originalViewName STRING ;
 END PROPERTYDEFINITIONS
 MACRO sky130_fd_sc_hdll__tapvpwrvgnd_1
-  CLASS CORE ;
+  CLASS CORE WELLTAP ;
   FOREIGN sky130_fd_sc_hdll__tapvpwrvgnd_1 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  0.460000 BY  2.720000 ;