diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c
index 7b1932b9f..5d7ab6af3 100644
--- a/src/jtag/drivers/stlink_usb.c
+++ b/src/jtag/drivers/stlink_usb.c
@@ -2286,7 +2286,7 @@ static int stlink_usb_write_reg(void *handle, unsigned int regsel, uint32_t val)
 		if (res != ERROR_OK)
 			return res;
 
-		return stlink_usb_write_debug_reg(h, DCB_DCRSR, DCRSR_WnR | (regsel & 0x7f));
+		return stlink_usb_write_debug_reg(h, DCB_DCRSR, DCRSR_WNR | (regsel & 0x7f));
 		/* FIXME: poll DHCSR.S_REGRDY after write DCRSR */
 	}
 
diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c
index c30556c8a..bd68fe868 100644
--- a/src/target/cortex_m.c
+++ b/src/target/cortex_m.c
@@ -169,7 +169,7 @@ static int cortex_m_store_core_reg_u32(struct target *target,
 	if (retval != ERROR_OK)
 		return retval;
 
-	retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRSR, regsel | DCRSR_WnR);
+	retval = mem_ap_write_atomic_u32(armv7m->debug_ap, DCB_DCRSR, regsel | DCRSR_WNR);
 	if (retval != ERROR_OK)
 		return retval;
 
diff --git a/src/target/cortex_m.h b/src/target/cortex_m.h
index 453305483..16fc8ab70 100644
--- a/src/target/cortex_m.h
+++ b/src/target/cortex_m.h
@@ -77,7 +77,7 @@ struct cortex_m_part_info {
 #define DCB_DEMCR	0xE000EDFC
 #define DCB_DSCSR	0xE000EE08
 
-#define DCRSR_WnR	BIT(16)
+#define DCRSR_WNR	BIT(16)
 
 #define DWT_CTRL	0xE0001000
 #define DWT_CYCCNT	0xE0001004