diff --git a/src/build/build_options.c b/src/build/build_options.c
index 6d23e788e..a18daa4b8 100644
--- a/src/build/build_options.c
+++ b/src/build/build_options.c
@@ -172,6 +172,7 @@ static void usage(bool full)
 		print_opt("--benchfn <name>", "Override the benchmark runner function name.");
 		PRINTF("");
 		print_opt("--reloc=<option>", "Relocation model: none, pic, PIC, pie, PIE.");
+		print_opt("--cpu-flags <string>", "Add/remove cpu flags fromt the default, e.g. '+a,-b'.");
 		print_opt("--x86cpu=<option>", "Set general level of x64 cpu: baseline, ssse3, sse4, avx1, avx2-v1, avx2-v2 (Skylake/Zen1+), avx512 (Icelake/Zen4+), native.");
 		print_opt("--x86vec=<option>", "Set max type of vector use: none, mmx, sse, avx, avx512, default.");
 		print_opt("--riscv-abi=<option>", "Set type of RISC-V ABI: int-only, float, double.");