diff --git a/compiler/depends.nim b/compiler/depends.nim
index 7225b6b47..30fc961c5 100644
--- a/compiler/depends.nim
+++ b/compiler/depends.nim
@@ -25,7 +25,7 @@ type
     dotGraph: Rope
 
 proc addDependencyAux(b: Backend; importing, imported: string) =
-  b.dotGraph.addf("$1 -> \"$2\";$n", [rope(importing), rope(imported)])
+  b.dotGraph.addf("\"$1\" -> \"$2\";$n", [rope(importing), rope(imported)])
   # s1 -> s2_4[label="[0-9]"];
 
 proc addDotDependency(c: PPassContext, n: PNode): PNode =