diff --git a/README.md b/README.md
index 1374fba..df0639a 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,10 @@
 int main(int argc, char * argv[])
 {
   @autoreleasepool {
-    rebind_symbols((struct rebinding[2]){{"close", my_close, (void *)&orig_close}, {"open", my_open, (void *)&orig_open}}, 2);
+    rebind_symbols((struct rebinding[2]){
+      {"close", "/usr/lib/libSystem.B.dylib", my_close, (void *)&orig_close},
+      {"open", "/usr/lib/libSystem.B.dylib", my_open, (void *)&orig_open}
+    }, 2);
  
     // Open our own binary and print out first 4 bytes (which is the same
     // for all Mach-O binaries on a given architecture)