diff --git a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.lef b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.lef
index 6342a0f..cce8175 100644
--- a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.lef
+++ b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.lef
@@ -19,7 +19,7 @@
   DIVIDERCHAR "/" ;
   BUSBITCHARS "[]" ;
 MACRO sky130_fd_sc_hs__fill_diode_2
-  CLASS SPACER ;
+  CLASS CORE SPACER ;
   FOREIGN scs8hs_fill_diode_2 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  0.960000 BY  3.330000 ;
diff --git a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.magic.lef b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.magic.lef
index e3942da..a3df2d2 100644
--- a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.magic.lef
+++ b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_2.magic.lef
@@ -19,7 +19,7 @@
   DIVIDERCHAR "/" ;
   BUSBITCHARS "[]" ;
 MACRO sky130_fd_sc_hs__fill_diode_2
-  CLASS SPACER ;
+  CLASS CORE SPACER ;
   FOREIGN sky130_fd_sc_hs__fill_diode_2 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  0.960000 BY  3.330000 ;
diff --git a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.lef b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.lef
index a88155a..a0d7caf 100644
--- a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.lef
+++ b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.lef
@@ -19,7 +19,7 @@
   DIVIDERCHAR "/" ;
   BUSBITCHARS "[]" ;
 MACRO sky130_fd_sc_hs__fill_diode_4
-  CLASS SPACER ;
+  CLASS CORE SPACER ;
   FOREIGN scs8hs_fill_diode_4 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  1.920000 BY  3.330000 ;
diff --git a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.magic.lef b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.magic.lef
index 817e8c0..421743f 100644
--- a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.magic.lef
+++ b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_4.magic.lef
@@ -19,7 +19,7 @@
   DIVIDERCHAR "/" ;
   BUSBITCHARS "[]" ;
 MACRO sky130_fd_sc_hs__fill_diode_4
-  CLASS SPACER ;
+  CLASS CORE SPACER ;
   FOREIGN sky130_fd_sc_hs__fill_diode_4 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  1.920000 BY  3.330000 ;
diff --git a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.lef b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.lef
index 3aa025c..7a7989b 100644
--- a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.lef
+++ b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.lef
@@ -19,7 +19,7 @@
   DIVIDERCHAR "/" ;
   BUSBITCHARS "[]" ;
 MACRO sky130_fd_sc_hs__fill_diode_8
-  CLASS SPACER ;
+  CLASS CORE SPACER ;
   FOREIGN scs8hs_fill_diode_8 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  3.840000 BY  3.330000 ;
diff --git a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.magic.lef b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.magic.lef
index 8069a3a..aacadfb 100644
--- a/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.magic.lef
+++ b/cells/fill_diode/sky130_fd_sc_hs__fill_diode_8.magic.lef
@@ -19,7 +19,7 @@
   DIVIDERCHAR "/" ;
   BUSBITCHARS "[]" ;
 MACRO sky130_fd_sc_hs__fill_diode_8
-  CLASS SPACER ;
+  CLASS CORE SPACER ;
   FOREIGN sky130_fd_sc_hs__fill_diode_8 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  3.840000 BY  3.330000 ;