diff --git a/README.md b/README.md
index 1be0575d..3fca79fc 100644
--- a/README.md
+++ b/README.md
@@ -169,7 +169,7 @@ Program usage:
     --m=<height>[:max height[:step]]                  Height of GEMM problem (number of rows of C). May specify a range with optional step size.
     --n=<width>[:max width[:step]]                    Width of GEMM problem (number of columns of C). May specify a range with optional step size.
     --k=<depth>[:max depth[:step]]                    Size of inner dimension of A and B. May specify a range with optional step size.
-    --kernels=<{s|d|h|i|wmma}_gemm_{nn,nt,tn,tt}>     Select GEMM datatype and layout to use for tests
+    --kernels=<{s|d|h|i|wmma_}gemm_{nn,nt,tn,tt}>     Select GEMM datatype and layout to use for tests
     --peak=<bool>                                     If true, only reports peak performance per kernel after profiling specified problem space.
     --save_workspace={*never,incorrect,always}        Specifies when to save the GEMM inputs and results to the filesystem.
     --seed=<seed>                                     Random seed used by the random number generator in initializing input matrices.
diff --git a/tools/test/perf/testbench_options.h b/tools/test/perf/testbench_options.h
index a58dedf1..dd267629 100644
--- a/tools/test/perf/testbench_options.h
+++ b/tools/test/perf/testbench_options.h
@@ -546,7 +546,7 @@ struct TestbenchOptions {
         << "  --k=<depth>[:max depth[:step]]                "
         << "    Size of inner dimension of A and B. May specify a range with optional step size.\n"
 
-        << "  --kernels=<{s|d|h|i|wmma}_gemm_{nn,nt,tn,tt}> "
+        << "  --kernels={s|d|h|i|wmma_}gemm_{nn,nt,tn,tt}   "
         << "    Select GEMM datatype and layout to use for tests\n"
 
         << "  --peak=<bool>                                 "