diff --git a/src/compiler/glsl/ast_function.cpp b/src/compiler/glsl/ast_function.cpp
index 9012cbdb16d..4957a6c91d9 100644
--- a/src/compiler/glsl/ast_function.cpp
+++ b/src/compiler/glsl/ast_function.cpp
@@ -2439,7 +2439,7 @@ ast_function_expression::hir(exec_list *instructions,
             ir_dereference *lhs = new(ctx) ir_dereference_variable(var);
             ir_instruction *assignment = new(ctx) ir_assignment(lhs, result);
             instructions->push_tail(assignment);
-            result = lhs;
+            result = new(ctx) ir_dereference_variable(var);
          }
 
          /* Attempt to convert the parameter to a constant valued expression.