diff --git a/darling/CMakeLists.txt b/darling/CMakeLists.txt
index 7964f80..72d2be0 100644
--- a/darling/CMakeLists.txt
+++ b/darling/CMakeLists.txt
@@ -46,6 +46,7 @@ set(objcdarwin_SRCS
 	common/selector.cpp
 	common/cfstring.cpp
 	dso_handle.c
+	dummy.c
 	../../../util/debug.cpp
 	
 	# These two should go into Foundation
diff --git a/darling/dummy.c b/darling/dummy.c
new file mode 100644
index 0000000..309e659
--- /dev/null
+++ b/darling/dummy.c
@@ -0,0 +1,5 @@
+__attribute__((visibility("default")))
+void* _objc_empty_cache;
+__attribute__((visibility("default")))
+void* _objc_empty_vtable;
+
diff --git a/darling/x86-64/objc_msgSendSuper.S b/darling/x86-64/objc_msgSendSuper.S
index 65d5abc..53dbf82 100644
--- a/darling/x86-64/objc_msgSendSuper.S
+++ b/darling/x86-64/objc_msgSendSuper.S
@@ -31,12 +31,12 @@ objc_msgSendSuper2:
 	movq 8(%rax), %rax // load superclass
 	movq %rax, -8(%rsp)
 
-	subq %rsp, 16
+	subq $16, %rsp
 	movq %rsp, %rdi
 	
 	call objc_msg_lookup_super@PLT
 	
-	addq %rsp, 16
+	addq $16, %rsp
 	
 	RestoreRegisters
 	
@@ -63,13 +63,13 @@ objc_msgSendSuper2_stret:
 	movq 8(%rax), %rax // load superclass
 	movq %rax, -8(%rsp)
 
-	subq %rsp, 16
+	subq $16, %rsp
 	movq %rsp, %rdi
 	movq %rdx, %rsi
 	
 	call objc_msg_lookup_super@PLT
 	
-	addq %rsp, 16
+	addq $16, %rsp
 	
 	RestoreRegisters