diff --git a/helper/plugin/grpc_provider.go b/helper/plugin/grpc_provider.go
index 63f41af41..9ee006cbc 100644
--- a/helper/plugin/grpc_provider.go
+++ b/helper/plugin/grpc_provider.go
@@ -1119,13 +1119,6 @@ func stripSchema(s *schema.Schema) *schema.Schema {
 func copyMissingValues(dst, src cty.Value) cty.Value {
 	ty := dst.Type()
 
-	// In this case the provider set an empty string which was lost in
-	// conversion. Since src is unknown, there must have been a corresponding
-	// value set.
-	if ty == cty.String && dst.IsNull() && !src.IsKnown() {
-		return cty.StringVal("")
-	}
-
 	if src.IsNull() || !src.IsKnown() || !dst.IsKnown() {
 		return dst
 	}
diff --git a/helper/plugin/grpc_provider_test.go b/helper/plugin/grpc_provider_test.go
index 4df64cdac..96799b868 100644
--- a/helper/plugin/grpc_provider_test.go
+++ b/helper/plugin/grpc_provider_test.go
@@ -821,27 +821,6 @@ func TestCopyMissingValues(t *testing.T) {
 				}),
 			}),
 		},
-		{
-			// Recover the lost unknown key, assuming it was set to an empty
-			// string and lost.
-			Src: cty.ObjectVal(map[string]cty.Value{
-				"map": cty.MapVal(map[string]cty.Value{
-					"a": cty.StringVal("a"),
-					"b": cty.UnknownVal(cty.String),
-				}),
-			}),
-			Dst: cty.ObjectVal(map[string]cty.Value{
-				"map": cty.MapVal(map[string]cty.Value{
-					"a": cty.StringVal("a"),
-				}),
-			}),
-			Expect: cty.ObjectVal(map[string]cty.Value{
-				"map": cty.MapVal(map[string]cty.Value{
-					"a": cty.StringVal("a"),
-					"b": cty.StringVal(""),
-				}),
-			}),
-		},
 	} {
 		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
 			got := copyMissingValues(tc.Dst, tc.Src)