diff --git a/sys/amd64/amd64/db_trace.c b/sys/amd64/amd64/db_trace.c
index f9a0c2b6a03..73b03334ffa 100644
--- a/sys/amd64/amd64/db_trace.c
+++ b/sys/amd64/amd64/db_trace.c
@@ -206,7 +206,8 @@ db_nextframe(db_addr_t *fp, db_addr_t *ip, struct thread *td)
 	 */
 	tf_addr = *fp + 16;
 
-	if (!__is_aligned(tf_addr, _Alignof(*tf)) || !INKERNEL(tf_addr)) {
+	if (!__is_aligned(tf_addr, _Alignof(struct trapframe)) ||
+	    !INKERNEL(tf_addr)) {
 		db_printf("--- invalid trapframe %p\n", (void *)tf_addr);
 		*ip = 0;
 		*fp = 0;
diff --git a/sys/arm64/arm64/db_trace.c b/sys/arm64/arm64/db_trace.c
index cb1c0789b03..87ff4b72529 100644
--- a/sys/arm64/arm64/db_trace.c
+++ b/sys/arm64/arm64/db_trace.c
@@ -93,7 +93,7 @@ db_stack_trace_cmd(struct thread *td, struct unwind_state *frame)
 			struct trapframe *tf;
 
 			tf = (struct trapframe *)(uintptr_t)frame->fp - 1;
-			if (!__is_aligned(tf, _Alignof(*tf)) ||
+			if (!__is_aligned(tf, _Alignof(struct trapframe)) ||
 			    !kstack_contains(td, (vm_offset_t)tf,
 			    sizeof(*tf))) {
 				db_printf("--- invalid trapframe %p\n", tf);
diff --git a/sys/riscv/riscv/db_trace.c b/sys/riscv/riscv/db_trace.c
index 12972839c29..148ad88b3ff 100644
--- a/sys/riscv/riscv/db_trace.c
+++ b/sys/riscv/riscv/db_trace.c
@@ -84,7 +84,7 @@ db_stack_trace_cmd(struct thread *td, struct unwind_state *frame)
 			struct trapframe *tf;
 
 			tf = (struct trapframe *)(uintptr_t)frame->sp;
-			if (!__is_aligned(tf, _Alignof(*tf)) ||
+			if (!__is_aligned(tf, _Alignof(struct trapframe)) ||
 			    !kstack_contains(td, (vm_offset_t)tf,
 			    sizeof(*tf))) {
 				db_printf("--- invalid trapframe %p\n", tf);