diff --git a/vlib/v/gen/x64/gen.v b/vlib/v/gen/x64/gen.v
index 02dc911d4f..6a26a96851 100644
--- a/vlib/v/gen/x64/gen.v
+++ b/vlib/v/gen/x64/gen.v
@@ -27,6 +27,7 @@ enum Register {
 	rax
 	rdi
 	rsi
+	rbp
 	edx
 	rdx
 	r12
@@ -214,6 +215,13 @@ pub fn (var g Gen) ret() {
 	g.write8(0xc3)
 }
 
+pub fn (var g Gen) push(reg Register) {
+	match reg {
+		.rbp { g.write8(0x55) }
+		else {}
+	}
+}
+
 // returns label's relative address
 pub fn (var g Gen) gen_loop_start(from int) int {
 	g.mov(.r12, from)
diff --git a/vlib/v/gen/x64/tests/x64_test.v b/vlib/v/gen/x64/tests/x64_test.v
index 2695f1601d..b766d97dc5 100644
--- a/vlib/v/gen/x64/tests/x64_test.v
+++ b/vlib/v/gen/x64/tests/x64_test.v
@@ -49,9 +49,12 @@ fn test_x64() {
 			panic(err)
 		}
 		expected = expected.trim_space().trim('\n').replace('\r\n', '\n')
-		mut found := res.output.trim_space().trim('\n').replace('\r\n', '\n')
-		found = found[..found.len-1] // remove ACK char TODO fix this
-
+		var found := res.output.trim_space().trim('\n').replace('\r\n', '\n')
+		// remove ACK char TODO fix this in x64
+		buf := [byte(0x06)]
+		ack := string(buf)
+		found = found.replace(ack, '')
+		found = found.trim_space()
 		if expected != found {
 			println(term.red('FAIL'))
 			println('============')
@@ -72,4 +75,3 @@ fn test_x64() {
 		exit(1)
 	}
 }
-