diff --git a/arch/x86/core/ia32/irq_manage.c b/arch/x86/core/ia32/irq_manage.c
index d35f2067f14..752a95d9984 100644
--- a/arch/x86/core/ia32/irq_manage.c
+++ b/arch/x86/core/ia32/irq_manage.c
@@ -193,7 +193,7 @@ extern const struct pseudo_descriptor z_x86_idt;
 
 static void idt_vector_install(int vector, void *irq_handler)
 {
-	int key;
+	unsigned int key;
 
 	key = irq_lock();
 	z_init_irq_gate(&z_x86_idt.entries[vector], CODE_SEG,
diff --git a/kernel/mmu.c b/kernel/mmu.c
index 4e1d8fea230..47473f4a2dd 100644
--- a/kernel/mmu.c
+++ b/kernel/mmu.c
@@ -1482,7 +1482,7 @@ bool z_page_fault(void *addr)
 static void do_mem_unpin(void *addr)
 {
 	struct z_page_frame *pf;
-	int key;
+	unsigned int key;
 	uintptr_t flags, phys;
 
 	key = irq_lock();
diff --git a/kernel/paging/statistics.c b/kernel/paging/statistics.c
index 855d60fd6da..f1017687f3e 100644
--- a/kernel/paging/statistics.c
+++ b/kernel/paging/statistics.c
@@ -79,7 +79,7 @@ k_mem_paging_backing_store_histogram_bounds[
 unsigned long z_num_pagefaults_get(void)
 {
 	unsigned long ret;
-	int key;
+	unsigned int key;
 
 	key = irq_lock();
 	ret = paging_stats.pagefaults.cnt;
diff --git a/samples/userspace/prod_consumer/src/sample_driver_foo.c b/samples/userspace/prod_consumer/src/sample_driver_foo.c
index 3ffe6874a82..929ff6c1e00 100644
--- a/samples/userspace/prod_consumer/src/sample_driver_foo.c
+++ b/samples/userspace/prod_consumer/src/sample_driver_foo.c
@@ -40,7 +40,7 @@ static int sample_driver_foo_set_callback(const struct device *dev,
 					  void *context)
 {
 	struct sample_driver_foo_dev_data *data = dev->data;
-	int key = irq_lock();
+	unsigned int key = irq_lock();
 
 	data->cb_context = context;
 	data->cb = cb;
diff --git a/soc/arm/nxp_lpc/lpc11u6x/iap.h b/soc/arm/nxp_lpc/lpc11u6x/iap.h
index 6a3964e8ce5..4157d30526d 100644
--- a/soc/arm/nxp_lpc/lpc11u6x/iap.h
+++ b/soc/arm/nxp_lpc/lpc11u6x/iap.h
@@ -53,7 +53,7 @@
  */
 static inline int iap_cmd(unsigned int cmd[5])
 {
-	int key;
+	unsigned int key;
 	int status[5];
 
 	/*