diff --git a/src/SubPrecisionContactDetection.jl b/src/SubPrecisionContactDetection.jl
index 2343011..657c0bf 100644
--- a/src/SubPrecisionContactDetection.jl
+++ b/src/SubPrecisionContactDetection.jl
@@ -1341,7 +1341,7 @@ end
 
 Save metadata (dict) into fname (json)
 """
-function save_meta(meta, fname)
+function save_meta(fname, meta)
     open(fname, "w") do io
         JSON.print(io, meta)
     end
diff --git a/test/runtests.jl b/test/runtests.jl
index 79c8ac0..d4ed577 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -136,7 +136,7 @@ using Distributions
 
     @testset "meta" begin    
         args = get_defaults()
-        save_meta(args, "test.json")
+        save_meta("test.json", args)
         fargs = read_meta("test.json")
         @test args == fargs
     end