diff --git a/benchmark/benchmark.num_arrays.js b/benchmark/benchmark.num_arrays.js
index 84e090c..9886ff5 100644
--- a/benchmark/benchmark.num_arrays.js
+++ b/benchmark/benchmark.num_arrays.js
@@ -118,7 +118,7 @@ function main() {
 
 	for ( i = min; i <= max; i++ ) {
 		f = createBenchmark( i, 10 );
-		bench( pkg+'::ndarray,2d::num_arrays='+i+',from_ndims=2,to_ndims=10', f );
+		bench( pkg+'::ndarray,2d:num_arrays='+i+',from_ndims=2,to_ndims=10', f );
 	}
 }