diff --git a/arch/arm/src/imxrt/hardware/imxrt_enet.h b/arch/arm/src/imxrt/hardware/imxrt_enet.h
index 5dbaf0934a..7b879d6b3f 100644
--- a/arch/arm/src/imxrt/hardware/imxrt_enet.h
+++ b/arch/arm/src/imxrt/hardware/imxrt_enet.h
@@ -207,7 +207,7 @@
 #  define ENET_MMFR_OP_WRNOTMII      (0 << ENET_MMFR_OP_SHIFT) /* Write frame, not MII compliant */
 #  define ENET_MMFR_OP_WRMII         (1 << ENET_MMFR_OP_SHIFT) /* Write frame, MII management frame */
 #  define ENET_MMFR_OP_RDMII         (2 << ENET_MMFR_OP_SHIFT) /* Read frame, MII management frame */
-#  define ENET_MMFR_OP_RdNOTMII      (3 << ENET_MMFR_OP_SHIFT) /* Read frame, not MII compliant */
+#  define ENET_MMFR_OP_RDNOTMII      (3 << ENET_MMFR_OP_SHIFT) /* Read frame, not MII compliant */
 
 #define ENET_MMFR_ST_SHIFT           (30)      /* Bits 30-31: Start of frame delimiter */
 #define ENET_MMFR_ST_MASK            (3 << ENET_MMFR_ST_SHIFT)
diff --git a/arch/arm/src/imxrt/imxrt_enet.c b/arch/arm/src/imxrt/imxrt_enet.c
index 42dc9f4217..71861de2a4 100644
--- a/arch/arm/src/imxrt/imxrt_enet.c
+++ b/arch/arm/src/imxrt/imxrt_enet.c
@@ -2259,7 +2259,7 @@ static int imxrt_readmmd(struct imxrt_driver_s *priv, uint8_t phyaddr,
 
   imxrt_enet_putreg32(priv,
                       0 << ENET_MMFR_ST_SHIFT |
-                      ENET_MMFR_OP_RdNOTMII |
+                      ENET_MMFR_OP_RDNOTMII |
                       (uint32_t)mmd << ENET_MMFR_RA_SHIFT |
                       (uint32_t)phyaddr << ENET_MMFR_PA_SHIFT |
                       2 << ENET_MMFR_TA_SHIFT,