diff --git a/src/loadsave.jl b/src/loadsave.jl
index 4270673f..3018dc25 100644
--- a/src/loadsave.jl
+++ b/src/loadsave.jl
@@ -21,7 +21,12 @@ for (applicable_, add_, dict_) in (
         (:applicable_loaders, :add_loader, :sym2loader),
         (:applicable_savers,  :add_saver,  :sym2saver))
     @eval begin
-        $applicable_{sym}(::Union{Type{DataFormat{sym}}, Formatted{DataFormat{sym}}}) = get($dict_, sym, [:FileIO]) # if no loader is declared, fallback to FileIO
+        function $applicable_{sym}(::Union{Type{DataFormat{sym}}, Formatted{DataFormat{sym}}})
+            if haskey($dict_, sym)
+                return $dict_[sym]
+            end
+            error("No $($applicable_) found for $(sym)")
+        end
         function $add_{sym}(::Type{DataFormat{sym}}, pkg::Symbol)
             list = get($dict_, sym, Symbol[])
             $dict_[sym] = push!(list, pkg)
diff --git a/test/query.jl b/test/query.jl
index 316262c3..4d14552d 100644
--- a/test/query.jl
+++ b/test/query.jl
@@ -316,7 +316,8 @@ end
     open(q) do io
         @test position(io) == 0
         @test FileIO.detect_rdata(io)
-        @test position(io) == 5
+        # 6 for /r/n  and 5 for /n
+        @test (position(io) in (5, 6))
     end
 end
 @testset "Format with function for magic bytes" begin