Fix minor spelling mistake in programs/pkey/gen_key.c
diff --git a/programs/pkey/gen_key.c b/programs/pkey/gen_key.c
index f60cad7..63a3aeb 100644
--- a/programs/pkey/gen_key.c
+++ b/programs/pkey/gen_key.c
@@ -209,7 +209,7 @@
         ret = 1;
         mbedtls_printf( USAGE );
 #if defined(MBEDTLS_ECP_C)
-        mbedtls_printf( " availabled ec_curve values:\n" );
+        mbedtls_printf( " available ec_curve values:\n" );
         curve_info = mbedtls_ecp_curve_list();
         mbedtls_printf( "    %s (default)\n", curve_info->name );
         while( ( ++curve_info )->name != NULL )