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-rw-r--r--src/nix-store/main.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix-store/main.cc b/src/nix-store/main.cc
index 78599e30869c..7bc8565d293d 100644
--- a/src/nix-store/main.cc
+++ b/src/nix-store/main.cc
@@ -222,7 +222,7 @@ static void opGC(Strings opFlags, Strings opArgs)
     if (flag == "--print-live") subOp = soPrintLive;
     else if (flag == "--print-dead") subOp = soPrintDead;
     else if (flag == "--delete") subOp = soDelete;
-    else throw UsageError(format("bad sub-operation `%1% in GC") % flag);
+    else throw UsageError(format("bad sub-operation `%1%' in GC") % flag);
         
     Paths roots;
     while (1) {