diff --git a/flow/designs/asap7/riscv32i-mock-sram/config.mk b/flow/designs/asap7/riscv32i-mock-sram/config.mk
index 12ef90ef46..2a8b50b0ab 100644
--- a/flow/designs/asap7/riscv32i-mock-sram/config.mk
+++ b/flow/designs/asap7/riscv32i-mock-sram/config.mk
@@ -1,5 +1,11 @@
 export DESIGN_NICKNAME = riscv32i-mock-sram
 export BLOCKS=fakeram7_256x32
 
+# Override platform default (BLOCKS_grid_strategy.tcl) which defines an
+# ElementGrid macro grid with no stripes, producing empty PDN grids
+# (PDN-0232/0233). BLOCK_grid_strategy.tcl uses M4-M5 connections that
+# match the block's MAX_ROUTING_LAYER=M4 constraint.
+export PDN_TCL = $(PLATFORM_DIR)/openRoad/pdn/BLOCK_grid_strategy.tcl
+
 include designs/asap7/riscv32i/config.mk