diff --git a/src/main.cc b/src/main.cc
index 4bba123d9e..4e3a639902 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -190,6 +190,7 @@ void usage()
 	fprintf(stderr, "    -C|--no-checksums              | ignore checksums\n");
 	fprintf(stderr, "    -F|--force-dns                 | force DNS\n");
 	fprintf(stderr, "    -I|--print-id <ID name>        | print out given ID\n");
+	fprintf(stderr, "    -J|--set-seed <seed>           | set the random number seed\n");
 	fprintf(stderr, "    -K|--md5-hashkey <hashkey>     | set key for MD5-keyed hashing\n");
 	fprintf(stderr, "    -N|--print-plugins             | print available plugins and exit (-NN for verbose)\n");
 	fprintf(stderr, "    -O|--optimize                  | optimize policy script\n");
@@ -549,7 +550,7 @@ int main(int argc, char** argv)
 	opterr = 0;
 
 	char opts[256];
-	safe_strncpy(opts, "B:e:f:I:i:K:n:p:R:r:s:T:t:U:w:x:X:z:CFGNOPSWabdghvQ",
+	safe_strncpy(opts, "B:e:f:I:i:J:K:n:p:R:r:s:T:t:U:w:x:X:z:CFGNOPSWabdghvQ",
 		     sizeof(opts));
 
 #ifdef USE_PERFTOOLS_DEBUG