diff --git a/arch/arm/src/imxrt/imxrt_irq.c b/arch/arm/src/imxrt/imxrt_irq.c
index 11fd69b0dca..db3d852e348 100644
--- a/arch/arm/src/imxrt/imxrt_irq.c
+++ b/arch/arm/src/imxrt/imxrt_irq.c
@@ -24,6 +24,7 @@
 
 #include <nuttx/config.h>
 
+#include <inttypes.h>
 #include <stdint.h>
 #include <debug.h>
 
@@ -230,7 +231,8 @@ static int imxrt_nmi(int irq, FAR void *context, FAR void *arg)
 static int imxrt_busfault(int irq, FAR void *context, FAR void *arg)
 {
   up_irq_save();
-  _err("PANIC!!! Bus fault received: %08x\n", getreg32(NVIC_CFAULTS));
+  _err("PANIC!!! Bus fault received: %08" PRIx32 "\n",
+       getreg32(NVIC_CFAULTS));
   PANIC();
   return 0;
 }
@@ -238,7 +240,8 @@ static int imxrt_busfault(int irq, FAR void *context, FAR void *arg)
 static int imxrt_usagefault(int irq, FAR void *context, FAR void *arg)
 {
   up_irq_save();
-  _err("PANIC!!! Usage fault received: %08x\n", getreg32(NVIC_CFAULTS));
+  _err("PANIC!!! Usage fault received: %08" PRIx32 "\n",
+       getreg32(NVIC_CFAULTS));
   PANIC();
   return 0;
 }