diff --git a/src/mesa/shader/prog_instruction.h b/src/mesa/shader/prog_instruction.h
index 39a221eeaba..1c687bc16cf 100644
--- a/src/mesa/shader/prog_instruction.h
+++ b/src/mesa/shader/prog_instruction.h
@@ -121,7 +121,6 @@
 /*@{*/
 #define SATURATE_OFF            0
 #define SATURATE_ZERO_ONE       1
-#define SATURATE_PLUS_MINUS_ONE 2
 /*@}*/
 
 
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index 2ab12d3cf3f..df0cf8df266 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -173,8 +173,6 @@ convert_sat(
       return TGSI_SAT_NONE;
    case SATURATE_ZERO_ONE:
       return TGSI_SAT_ZERO_ONE;
-   case SATURATE_PLUS_MINUS_ONE:
-      return TGSI_SAT_MINUS_PLUS_ONE;
    default:
       assert( 0 );
       return TGSI_SAT_NONE;