diff --git a/src/compiler/nir/spirv/spirv_to_nir.c b/src/compiler/nir/spirv/spirv_to_nir.c
index 544251f5a1f..6848c0207c8 100644
--- a/src/compiler/nir/spirv/spirv_to_nir.c
+++ b/src/compiler/nir/spirv/spirv_to_nir.c
@@ -363,7 +363,7 @@ vtn_handle_decoration(struct vtn_builder *b, SpvOp opcode,
          if (opcode == SpvOpGroupDecorate) {
             dec->scope = VTN_DEC_DECORATION;
          } else {
-            dec->scope = VTN_DEC_STRUCT_MEMBER0 + *(w++);
+            dec->scope = VTN_DEC_STRUCT_MEMBER0 + *(++w);
          }
 
          /* Link into the list */