diff --git a/extra/benchmark/terrain-generation/terrain-generation.factor b/extra/benchmark/terrain-generation/terrain-generation.factor
index 623a905bbc..b158dba5dd 100644
--- a/extra/benchmark/terrain-generation/terrain-generation.factor
+++ b/extra/benchmark/terrain-generation/terrain-generation.factor
@@ -1,10 +1,12 @@
 ! (c)Joe Groff bsd license
-USING: io kernel terrain.generation threads ;
+USING: io kernel math.vectors.simd terrain.generation threads ;
+FROM: alien.c-types => float ;
+SIMD: float
 IN: benchmark.terrain-generation
 
 : terrain-generation-benchmark ( -- )
     "Generating terrain segment..." write flush yield
-    <terrain> { 0 0 } terrain-segment drop
+    <terrain> float-4{ 0 0 0 1 } terrain-segment drop
     "done" print ;
 
 MAIN: terrain-generation-benchmark