diff --git a/src/mesa/drivers/dri/i965/brw_eu_emit.c b/src/mesa/drivers/dri/i965/brw_eu_emit.c
index 782706a82af..8f15db9f728 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_emit.c
@@ -226,10 +226,10 @@ extern int reg_type_size[];
 static void
 validate_reg(const struct brw_context *brw, brw_inst *inst, struct brw_reg reg)
 {
-   int hstride_for_reg[] = {0, 1, 2, 4};
-   int vstride_for_reg[] = {0, 1, 2, 4, 8, 16, 32};
-   int width_for_reg[] = {1, 2, 4, 8, 16};
-   int execsize_for_reg[] = {1, 2, 4, 8, 16};
+   const int hstride_for_reg[] = {0, 1, 2, 4};
+   const int vstride_for_reg[] = {0, 1, 2, 4, 8, 16, 32};
+   const int width_for_reg[] = {1, 2, 4, 8, 16};
+   const int execsize_for_reg[] = {1, 2, 4, 8, 16};
    int width, hstride, vstride, execsize;
 
    if (reg.file == BRW_IMMEDIATE_VALUE) {