diff --git a/usr.sbin/acpi/acpidb/Makefile b/usr.sbin/acpi/acpidb/Makefile
index 892f1e8c0cd..ca9c90f2646 100644
--- a/usr.sbin/acpi/acpidb/Makefile
+++ b/usr.sbin/acpi/acpidb/Makefile
@@ -90,3 +90,7 @@ LIBADD=	pthread
 .if ${COMPILER_TYPE} == "clang"
 CWARNFLAGS+=	-Wno-null-pointer-arithmetic
 .endif
+
+# AcpiUtInitStackPtrTrace intentionally leaks a pointer to an
+# on-stack variable.
+CWARNFLAGS.utdebug.c+= ${NO_WDANGLING_POINTER}
diff --git a/usr.sbin/acpi/iasl/Makefile b/usr.sbin/acpi/iasl/Makefile
index 15b6d7a03c3..6b95cc1d745 100644
--- a/usr.sbin/acpi/iasl/Makefile
+++ b/usr.sbin/acpi/iasl/Makefile
@@ -147,4 +147,8 @@ prparserparse.c prparserparse.h: prparser.y
 prparser.y.h: prparserparse.h .NOMETA
 	ln -f ${.ALLSRC} ${.TARGET}
 
+# AcpiUtInitStackPtrTrace intentionally leaks a pointer to an
+# on-stack variable.
+CWARNFLAGS.utdebug.c+= ${NO_WDANGLING_POINTER}
+
 .include <bsd.prog.mk>