diff --git a/src/mesa/drivers/dri/i965/brw_fs_emit.cpp b/src/mesa/drivers/dri/i965/brw_fs_emit.cpp
index d9ed27cf0ab..45072da6a67 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_emit.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_emit.cpp
@@ -951,8 +951,8 @@ fs_generator::generate_pack_half_2x16_split(fs_inst *inst,
 {
    assert(intel->gen >= 7);
    assert(dst.type == BRW_REGISTER_TYPE_UD);
-   assert(x.type = BRW_REGISTER_TYPE_F);
-   assert(y.type = BRW_REGISTER_TYPE_F);
+   assert(x.type == BRW_REGISTER_TYPE_F);
+   assert(y.type == BRW_REGISTER_TYPE_F);
 
    /* From the Ivybridge PRM, Vol4, Part3, Section 6.27 f32to16:
     *