diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 4587eda8170..54db9b101e5 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -1136,7 +1136,7 @@ glsl_to_tgsi_visitor::st_src_reg_for_double(double val)
    uval[0].u = *(uint32_t *)&val;
    uval[1].u = *(((uint32_t *)&val) + 1);
    src.index = add_constant(src.file, uval, 1, GL_DOUBLE, &src.swizzle);
-
+   src.swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_X, SWIZZLE_Y);
    return src;
 }