diff --git a/lldb/test/API/commands/settings/use_source_cache/Makefile b/lldb/test/API/commands/settings/use_source_cache/Makefile
index 791cb7d868d87..6c1c64fae074d 100644
--- a/lldb/test/API/commands/settings/use_source_cache/Makefile
+++ b/lldb/test/API/commands/settings/use_source_cache/Makefile
@@ -6,3 +6,4 @@ include Makefile.rules
 # Copy file into the build folder to enable the test to modify it.
 main-copy.cpp: main.cpp
 	cp -f $< $@
+	chmod u+w $@