diff --git a/basis/math/vectors/simd/intrinsics/intrinsics.factor b/basis/math/vectors/simd/intrinsics/intrinsics.factor
index b8dbe6d1bd..28bd2f8f83 100644
--- a/basis/math/vectors/simd/intrinsics/intrinsics.factor
+++ b/basis/math/vectors/simd/intrinsics/intrinsics.factor
@@ -266,8 +266,8 @@ SIMD-INTRINSIC: (simd-vany?)             ( a   rep -- ? ) [ bitor  ] bitwise-com
 SIMD-INTRINSIC: (simd-vall?)             ( a   rep -- ? ) [ bitand ] bitwise-components-reduce zero? not ;
 SIMD-INTRINSIC: (simd-vnone?)            ( a   rep -- ? ) [ bitor  ] bitwise-components-reduce zero?     ;
 SIMD-INTRINSIC: (simd-vgetmask)          ( a   rep -- n )
-    dup { float-4-rep double-2-rep } member?
-    [ ((vgetmask)) ] [ drop uchar-16-rep ((vgetmask)) ] if ;
+    { float-4-rep double-2-rep } member?
+    [ uint-4-rep ((vgetmask)) ] [ uchar-16-rep ((vgetmask)) ] if ;
 SIMD-INTRINSIC: (simd-v>float)           ( a   rep -- c )
     [ [ >rep-array ] [ rep-length ] bi [ >float ] ]
     [ >float-vector-rep <rep-array> ] bi unrolled-map-as-unsafe underlying>> ;
diff --git a/basis/math/vectors/simd/simd.factor b/basis/math/vectors/simd/simd.factor
index a277c651a3..432cca0718 100644
--- a/basis/math/vectors/simd/simd.factor
+++ b/basis/math/vectors/simd/simd.factor
@@ -113,7 +113,7 @@ DEFER: simd-construct-op
 : mask>count ( n rep -- n' )
     [ bit-count ] dip {
         { float-4-rep     [ ] }
-        { double-2-rep    [ ] }
+        { double-2-rep    [ -1 shift ] }
         { uchar-16-rep    [ ] }
         { char-16-rep     [ ] }
         { ushort-8-rep    [ -1 shift ] }