diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 3d0da88..ceda0b9 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -159,7 +159,7 @@
     """Check that there's at least 'amount' space that can be made
     available on /cache."""
     self.script.append(('apply_patch_space(%d) || abort("Not enough free space '
-                        'on /system to apply patches.");') % (amount,))
+                        'on /cache to apply patches.");') % (amount,))
 
   def Mount(self, mount_point, mount_options_by_format=""):
     """Mount the partition with the given mount_point.