diff --git a/flow/scripts/view_cells.tcl b/flow/scripts/view_cells.tcl
index fceee3f602..0f468e8acf 100644
--- a/flow/scripts/view_cells.tcl
+++ b/flow/scripts/view_cells.tcl
@@ -1,5 +1,8 @@
 # layout out all cells in SC_LEF in a grid for viewing
 
+source $::env(SCRIPTS_DIR)/util.tcl
+source $::env(SCRIPTS_DIR)/read_liberty.tcl
+
 read_lef $::env(TECH_LEF)
 read_lef $::env(SC_LEF)
 if { [info exist ::env(ADDITIONAL_LEFS)] } {