diff --git a/lib/std/zig/number_literal.zig b/lib/std/zig/number_literal.zig
index 754fefafb586a3674e9e278b094a875f29174979..45be08e0de9b63df8aff4a07661571121ac02f2f 100644
--- a/lib/std/zig/number_literal.zig
+++ b/lib/std/zig/number_literal.zig
@@ -123,7 +123,7 @@ pub fn parseNumberLiteral(bytes: []const u8) Result {
             '.' => {
                 if (exponent) return .{ .failure = .{ .period_after_exponent = i } };
                 float = true;
-                if (base != 10 and base != 16) return .{ .failure = .{ .invalid_float_base = 2 } };
+                if (base != 10 and base != 16) return .{ .failure = .{ .invalid_float_base = 1 } };
                 if (period) return .{ .failure = .duplicate_period };
                 period = true;
                 if (underscore) return .{ .failure = .{ .special_after_underscore = i } };
@@ -177,6 +177,7 @@ test parseNumberLiteral {
     try std.testing.expectEqual(Result{ .failure = .{ .period_after_exponent = 3 } }, parseNumberLiteral("3E2.5"));
     try std.testing.expectEqual(Result{ .failure = .{ .period_after_exponent = 2 } }, parseNumberLiteral("3E.5"));
     try std.testing.expectEqual(Result{ .failure = .{ .period_after_exponent = 3 } }, parseNumberLiteral("3E1."));
+    try std.testing.expectEqual(Result{ .failure = .{ .invalid_float_base = 1 } }, parseNumberLiteral("0o3.1"));
     try std.testing.expectEqual(Result{ .failure = .{ .invalid_digit = .{ .i = 3, .base = .octal } } }, parseNumberLiteral("0o3e1"));
 }
 
diff --git a/test/cases/compile_errors/invalid_number_literals.zig b/test/cases/compile_errors/invalid_number_literals.zig
index 5732c2bd44d8ee01cbc3a753a7aafbeb8d82e407..bd69a046e853fe2bee464901efb1bedb884cb314 100644
--- a/test/cases/compile_errors/invalid_number_literals.zig
+++ b/test/cases/compile_errors/invalid_number_literals.zig
@@ -19,6 +19,9 @@ comptime {
 comptime {
     _ = 0xP0;
 }
+comptime {
+    _ = 0o1.0;
+}
 
 // error
 //
@@ -29,3 +32,4 @@ comptime {
 // :14:13: error: unexpected period after exponent
 // :17:9: error: expected a digit after base prefix
 // :20:9: error: expected a digit after base prefix
+// :23:10: error: invalid base for float literal