diff --git a/lexers/z/zig.go b/lexers/z/zig.go
index 311d98de7..6c6c8f91e 100644
--- a/lexers/z/zig.go
+++ b/lexers/z/zig.go
@@ -30,10 +30,10 @@ var Zig = internal.Register(MustNewLexer(
 			{`0x[0-9a-fA-F]+\.?[pP][\-+]?[0-9a-fA-F]+`, LiteralNumberFloat, nil},
 			{`[0-9]+\.[0-9]+([eE][-+]?[0-9]+)?`, LiteralNumberFloat, nil},
 			{`[0-9]+\.?[eE][-+]?[0-9]+`, LiteralNumberFloat, nil},
-			{`0b([01](?:_?[01])+)+`, LiteralNumberBin, nil},
-			{`0o([0-7](?:_?[0-7])+)+`, LiteralNumberOct, nil},
-			{`0x([0-9a-fA-F](?:_?[0-9a-fA-F])+)+`, LiteralNumberHex, nil},
-			{`([0-9](?:_?[0-9])+)+`, LiteralNumberInteger, nil},
+			{`0b[01]+`, LiteralNumberBin, nil},
+			{`0o[0-7]+`, LiteralNumberOct, nil},
+			{`0x[0-9a-fA-F]+`, LiteralNumberHex, nil},
+			{`[0-9]+`, LiteralNumberInteger, nil},
 			{`@[a-zA-Z_]\w*`, NameBuiltin, nil},
 			{`[a-zA-Z_]\w*`, Name, nil},
 			{`\'\\\'\'`, LiteralStringEscape, nil},