diff --git a/verilog/dv/wb_utests/Makefile b/verilog/dv/wb_utests/Makefile
index 9684dfc..c2933a6 100644
--- a/verilog/dv/wb_utests/Makefile
+++ b/verilog/dv/wb_utests/Makefile
@@ -19,7 +19,7 @@
 .SUFFIXES:
 .SILENT: clean all
 
-PATTERNS = gpio_wb intercon_wb la_wb mem_wb mprj_ctrl spi_sysctrl_wb spimemio_wb uart_wb    
+PATTERNS = gpio_wb intercon_wb la_wb mem_wb mprj_ctrl spi_sysctrl_wb spimemio_wb uart_wb storage_wb  
 
 all:  ${PATTERNS}
 	for i in ${PATTERNS}; do \
diff --git a/verilog/dv/wb_utests/mem_wb/Makefile b/verilog/dv/wb_utests/mem_wb/Makefile
index 4ed37bf..60ea227 100644
--- a/verilog/dv/wb_utests/mem_wb/Makefile
+++ b/verilog/dv/wb_utests/mem_wb/Makefile
@@ -14,6 +14,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+PDK_PATH?=/ef/tech/SW/sky130A
+
 .SUFFIXES:
 
 PATTERN = mem_wb
@@ -21,7 +23,7 @@
 all:  ${PATTERN:=.vcd}
 
 %.vvp: %_tb.v
-	iverilog -I .. -I ../../../rtl \
+	iverilog -I $(PDK_PATH) -I .. -I ../../../rtl \
 	$< -o $@
 
 %.vcd: %.vvp