diff --git a/programs/test/benchmark.c b/programs/test/benchmark.c
old mode 100644
new mode 100755
index 502b15d..7cdff10
--- a/programs/test/benchmark.c
+++ b/programs/test/benchmark.c
@@ -844,7 +844,7 @@
              curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
              curve_info++ )
         {
-            if( mbedtls_ecdsa_can_do( curve_info->grp_id ) == 0 )
+            if( ! mbedtls_ecdsa_can_do( curve_info->grp_id ) )
                 continue;
 
             mbedtls_ecdsa_init( &ecdsa );
@@ -866,7 +866,7 @@
              curve_info->grp_id != MBEDTLS_ECP_DP_NONE;
              curve_info++ )
         {
-            if( mbedtls_ecdsa_can_do( curve_info->grp_id ) == 0 )
+            if( ! mbedtls_ecdsa_can_do( curve_info->grp_id ) )
                 continue;
 
             mbedtls_ecdsa_init( &ecdsa );