diff --git a/arch/risc-v/src/rv32m1/rv32m1_irq.c b/arch/risc-v/src/rv32m1/rv32m1_irq.c
index 9de192d2f8..3f21f49721 100644
--- a/arch/risc-v/src/rv32m1/rv32m1_irq.c
+++ b/arch/risc-v/src/rv32m1/rv32m1_irq.c
@@ -95,7 +95,7 @@ void up_irqinitialize(void)
 
 #if defined(CONFIG_STACK_COLORATION) && CONFIG_ARCH_INTERRUPTSTACK > 15
   size_t intstack_size = (CONFIG_ARCH_INTERRUPTSTACK & ~15);
-  riscv_stack_color(g_intstacktop - intstack_size, intstack_size);
+  riscv_stack_color(g_intstackalloc, intstack_size);
 #endif
 
   /* Clear all pending flags */