diff --git a/gcc/config/i386/i386-modes.def b/gcc/config/i386/i386-modes.def
index dbddfd8e48f..4e7014be034 100644
--- a/gcc/config/i386/i386-modes.def
+++ b/gcc/config/i386/i386-modes.def
@@ -107,19 +107,10 @@ INT_MODE (XI, 64);
 PARTIAL_INT_MODE (HI, 16, P2QI);
 PARTIAL_INT_MODE (SI, 32, P2HI);
 
-/* Mode used for signed overflow checking of TImode.  As
-   MAX_BITSIZE_MODE_ANY_INT is only 160, wide-int.h reserves only that
-   rounded up to multiple of HOST_BITS_PER_WIDE_INT bits in wide_int etc.,
-   so OImode is too large.  For the overflow checking we actually need
-   just 1 or 2 bits beyond TImode precision.  Use 160 bits to have
-   a multiple of 32.  */
+/* Mode used for signed overflow checking of TImode.  For the overflow
+   checking we actually need just 1 or 2 bits beyond TImode precision.
+   Use 160 bits to have a multiple of 32.  */
 PARTIAL_INT_MODE (OI, 160, POI);
 
-/* Keep the OI and XI modes from confusing the compiler into thinking
-   that these modes could actually be used for computation.  They are
-   only holders for vectors during data movement.  Include POImode precision
-   though.  */
-#define MAX_BITSIZE_MODE_ANY_INT (160)
-
 /* The symbol Pmode stands for one of the above machine modes (usually SImode).
    The tm.h file specifies which one.  It is not a distinct mode.  */