diff --git a/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
index 9c2e4512578..189888e371d 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
@@ -41,6 +41,7 @@ opt_saturate_propagation_local(fs_visitor *v, bblock_t *block)
 
       if (inst->opcode != BRW_OPCODE_MOV ||
           inst->dst.file != GRF ||
+          inst->src[0].file != GRF ||
           !inst->saturate)
          continue;