diff --git a/src/mame/drivers/stv.c b/src/mame/drivers/stv.c
index 3d46d46ac92..88e7d950c37 100644
--- a/src/mame/drivers/stv.c
+++ b/src/mame/drivers/stv.c
@@ -2348,9 +2348,10 @@ DRIVER_INIT ( stv )
 	install_stvbios_speedups(machine);
 
 	// do strict overwrite verification - maruchan and rsgun crash after coinup without this.
+	// cottonbm needs strict PCREL
 	// todo: test what games need this and don't turn it on for them...
-	cpunum_set_info_int(0, CPUINFO_INT_SH2_DRC_OPTIONS, SH2DRC_STRICT_VERIFY);
-	cpunum_set_info_int(1, CPUINFO_INT_SH2_DRC_OPTIONS, SH2DRC_STRICT_VERIFY);
+	cpunum_set_info_int(0, CPUINFO_INT_SH2_DRC_OPTIONS, SH2DRC_STRICT_VERIFY|SH2DRC_STRICT_PCREL);
+	cpunum_set_info_int(1, CPUINFO_INT_SH2_DRC_OPTIONS, SH2DRC_STRICT_VERIFY|SH2DRC_STRICT_PCREL);
 
 	/* debug .. watch the command buffer rsgun, cottonbm etc. appear to use to communicate between cpus */
 	memory_install_write32_handler(machine, 0, ADDRESS_SPACE_PROGRAM, 0x60ffc44, 0x60ffc47, 0, 0, w60ffc44_write );