diff --git a/arch/arm/include/aarch32/cortex_m/stack.h b/arch/arm/include/aarch32/cortex_m/stack.h
index c1ff2269565791..c6c6f57e5ef400 100644
--- a/arch/arm/include/aarch32/cortex_m/stack.h
+++ b/arch/arm/include/aarch32/cortex_m/stack.h
@@ -26,7 +26,7 @@
 extern "C" {
 #endif
 
-K_KERNEL_STACK_ARRAY_EXTERN(z_interrupt_stacks, CONFIG_MP_NUM_CPUS,
+extern K_KERNEL_STACK_ARRAY_DEFINE(z_interrupt_stacks, CONFIG_MP_NUM_CPUS,
 				   CONFIG_ISR_STACK_SIZE);
 
 /**