diff --git a/CHANGES b/CHANGES
index d563172c1..dafa39d3c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -22,6 +22,7 @@ Bugfixes:
  - Qt: Fix timing issues on high refresh rate monitors
  - GBA Savedata: Fix savedata unmasking (fixes mgba.io/i/441)
  - Util: Fix overflow when loading invalid UPS patches
+ - Tools: Fix recurring multiple times over the same library
 Misc:
  - SDL: Remove scancode key input
  - GBA Video: Clean up unused timers
diff --git a/tools/deploy-mac.py b/tools/deploy-mac.py
index 8305a4304..e525e3012 100755
--- a/tools/deploy-mac.py
+++ b/tools/deploy-mac.py
@@ -96,6 +96,7 @@ def updateMachO(bin, execPath, root):
 		if os.access(newPath, os.F_OK):
 			if verbose:
 				print('Skipping copying {}, already done.'.format(oldPath))
+			newPath = None
 		elif os.path.abspath(oldPath) != os.path.abspath(newPath):
 			if verbose:
 				print('Copying {} to {}...'.format(oldPath, newPath))
@@ -111,7 +112,8 @@ def updateMachO(bin, execPath, root):
 	args = [installNameTool]
 	for path, oldExecPath, newExecPath in toUpdate:
 		if path != bin:
-			updateMachO(path, execPath, root)
+			if path:
+				updateMachO(path, execPath, root)
 			if verbose:
 				print('Updating Mach-O load from {} to {}...'.format(oldExecPath, newExecPath))
 			args.extend(['-change', oldExecPath, newExecPath])