diff --git a/variables.mk b/variables.mk
index 63519983..20154c24 100644
--- a/variables.mk
+++ b/variables.mk
@@ -27,6 +27,7 @@ HELP_SIMULATION_VARIABLES = \
 "   BINARY                 = riscv elf binary that the simulator will run when using the run-binary* targets" \
 "   BINARIES               = list of riscv elf binary that the simulator will run when using the run-binaries* targets" \
 "   BINARIES_DIR           = directory of riscv elf binaries that the simulator will run when using the run-binaries* targets" \
+"   BINARY_ARGS            = arguments to pass to each binary in run-binary targets (primarily meant for pk arguments)" \
 "   LOADMEM                = riscv elf binary that should be loaded directly into simulated DRAM. LOADMEM=1 will load the BINARY elf" \
 "   LOADARCH               = path to a architectural checkpoint directory that should end in .loadarch/, for restoring from a checkpoint" \
 "   VERBOSE_FLAGS          = flags used when doing verbose simulation [$(VERBOSE_FLAGS)]" \
@@ -275,6 +276,7 @@ PERMISSIVE_ON=+permissive
 PERMISSIVE_OFF=+permissive-off
 BINARY ?=
 BINARIES ?=
+BINARY_ARGS ?=
 override SIM_FLAGS += +dramsim +dramsim_ini_dir=$(TESTCHIP_DIR)/src/main/resources/dramsim2_ini +max-cycles=$(TIMEOUT_CYCLES)
 VERBOSE_FLAGS ?= +verbose
 # get_out_name is a function, 1st argument is the binary