diff --git a/templates/chapter_20_templates/alignment_check_wrapper.s.jinja b/templates/chapter_20_templates/alignment_check_wrapper.s.jinja
index edbcb3ba..10bd8040 100644
--- a/templates/chapter_20_templates/alignment_check_wrapper.s.jinja
+++ b/templates/chapter_20_templates/alignment_check_wrapper.s.jinja
@@ -1,9 +1,9 @@
 {% extends "includes/wrapper_base.s.jinja" %}
 {% block call %}
 	# call test functions, all of which exit early on failure
-	callq	test1
-	callq	test2
-	callq	test3
+	callq	{{id_prefix}}test1
+	callq	{{id_prefix}}test2
+	callq	{{id_prefix}}test3
 {% endblock %}
 {% block more_functions %}
     .text
@@ -21,7 +21,7 @@
     je      {{local_prefix}}_OK
     # it's not zero; exit
     # using exit code already in EDI
-    call    exit@PLT
+    call    {{id_prefix}}exit{{plt_suffix}}
 {{local_prefix}}_OK:
     # success; rsp is aligned correctly
     movl    $0, %eax
diff --git a/tests/chapter_20/libraries/alignment_check_wrapper_osx.s b/tests/chapter_20/libraries/alignment_check_wrapper_osx.s
index 83d5aef4..c60dac08 100644
--- a/tests/chapter_20/libraries/alignment_check_wrapper_osx.s
+++ b/tests/chapter_20/libraries/alignment_check_wrapper_osx.s
@@ -34,9 +34,9 @@ _main:
 	movq	$-4, %r14
 	movq	$-5, %r15
 	# call test functions, all of which exit early on failure
-	callq	test1
-	callq	test2
-	callq	test3
+	callq	_test1
+	callq	_test2
+	callq	_test3
 	# make sure values of callee-saved regs were preserved
 	cmpq	$-1, %rbx
 	jne		Lfail
@@ -82,7 +82,7 @@ _check_alignment:
     je      L_OK
     # it's not zero; exit
     # using exit code already in EDI
-    call    exit@PLT
+    call    _exit
 L_OK:
     # success; rsp is aligned correctly
     movl    $0, %eax