diff --git a/source/dub/dub.d b/source/dub/dub.d
index 861e060..8fc1f88 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -999,7 +999,7 @@
 			return;
 		}
 
-		writePackageRecipe(srcfile[0 .. $-1] ~ ("dub."~destination_file_ext), m_project.rootPackage.recipe);
+		writePackageRecipe(srcfile[0 .. $-1] ~ ("dub."~destination_file_ext), m_project.rootPackage.rawRecipe);
 		removeFile(srcfile);
 	}
 
diff --git a/source/dub/package_.d b/source/dub/package_.d
index 0afcf55..08db442 100644
--- a/source/dub/package_.d
+++ b/source/dub/package_.d
@@ -63,6 +63,7 @@
 		Path m_path;
 		Path m_infoFile;
 		PackageRecipe m_info;
+		PackageRecipe m_rawRecipe;
 		Package m_parentPackage;
 	}
 
@@ -89,6 +90,9 @@
 	/// ditto
 	this(PackageRecipe recipe, Path root = Path(), Package parent = null, string version_override = "")
 	{
+		// save the original recipe
+		m_rawRecipe = recipe.clone;
+
 		if (!version_override.empty)
 			recipe.version_ = version_override;
 
@@ -192,9 +196,24 @@
 	@property void version_(Version value) { assert(m_parentPackage is null); m_info.version_ = value.toString(); }
 
 	/** Accesses the recipe contents of this package.
+
+		The recipe contains any default values and configurations added by DUB.
+		To access the raw user recipe, use the `rawRecipe` property.
+
+		See_Also: `rawRecipe`
 	*/
 	@property ref inout(PackageRecipe) recipe() inout { return m_info; }
 
+	/** Accesses the original package recipe.
+
+		The returned recipe matches exactly the contents of the original package
+		recipe. For the effective package recipe, augmented with DUB generated
+		default settings and configurations, use the `recipe` property.
+
+		See_Also: `recipe`
+	*/
+	@property ref const(PackageRecipe) rawRecipe() const { return m_rawRecipe; }
+
 	/** Returns the path to the package recipe file.
 
 		Note that this can be empty for packages that are not stored in the
diff --git a/source/dub/recipe/packagerecipe.d b/source/dub/recipe/packagerecipe.d
index 300c584..3ab9c66 100644
--- a/source/dub/recipe/packagerecipe.d
+++ b/source/dub/recipe/packagerecipe.d
@@ -94,6 +94,10 @@
 				return c;
 		throw new Exception("Unknown configuration: "~name);
 	}
+
+	/** Clones the package recipe recursively.
+	*/
+	PackageRecipe clone() const { return .clone(this); }
 }
 
 struct SubPackage
@@ -255,3 +259,32 @@
 		}
 	}
 }
+
+private T clone(T)(ref const(T) val)
+{
+	import std.traits : isSomeString, isDynamicArray, isAssociativeArray, isBasicType, ValueType;
+
+	static if (is(T == immutable)) return val;
+	else static if (isBasicType!T) return val;
+	else static if (isDynamicArray!T) {
+		alias V = typeof(T.init[0]);
+		static if (is(V == immutable)) return val;
+		else {
+			T ret = new V[val.length];
+			foreach (i, ref f; val)
+				ret[i] = clone!V(f);
+			return ret;
+		}
+	} else static if (isAssociativeArray!T) {
+		alias V = ValueType!T;
+		T ret;
+		foreach (k, ref f; val)
+			ret[k] = clone!V(f);
+		return ret;
+	} else static if (is(T == struct)) {
+		T ret;
+		foreach (i, M; typeof(T.tupleof))
+			ret.tupleof[i] = clone!M(val.tupleof[i]);
+		return ret;
+	} else static assert(false, "Unsupported type: "~T.stringof);
+}
diff --git a/test/issue820-extra-fields-after-convert.sh b/test/issue820-extra-fields-after-convert.sh
new file mode 100755
index 0000000..ec9e935
--- /dev/null
+++ b/test/issue820-extra-fields-after-convert.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+cd ${CURR_DIR}/1-exec-simple
+
+cp dub.json dub.json.bak
+${DUB} convert -f sdl
+
+if grep -c -e "version\|sourcePaths\|importPaths\|configuration" dub.sdl > /dev/null; then
+	echo "Conversion added extra fields."
+	mv dub.json.bak dub.json
+	rm dub.sdl
+	exit 1
+fi
+
+mv dub.json.bak dub.json
+rm dub.sdl