diff --git a/lib/wsprd/wsprsim.c b/lib/wsprd/wsprsim.c
index f368b2098..e1a63613e 100644
--- a/lib/wsprd/wsprsim.c
+++ b/lib/wsprd/wsprsim.c
@@ -151,7 +151,8 @@ int main(int argc, char *argv[])
                 writec2=1;
                 break;
             case 's':
-                snr = (float)atoi(optarg);
+//                snr = (float)atoi(optarg);
+                snr = atof(optarg);
                 break;
         }
     }