diff --git a/src/translate_c.zig b/src/translate_c.zig
index 395a314f7c..df8e285b59 100644
--- a/src/translate_c.zig
+++ b/src/translate_c.zig
@@ -1969,7 +1969,7 @@ fn transBuiltinFnExpr(c: *Context, scope: *Scope, expr: *const clang.Expr, used:
     const node = try transExpr(c, scope, expr, used);
     if (node.castTag(.identifier)) |ident| {
         const name = ident.data;
-        if (!isBuiltinDefined(name)) return fail(c, error.UnsupportedTranslation, expr.getBeginLoc(), "TODO implement function '{s}' in std.c.builtins", .{name});
+        if (!isBuiltinDefined(name)) return fail(c, error.UnsupportedTranslation, expr.getBeginLoc(), "TODO implement function '{s}' in std.zig.c_builtins", .{name});
     }
     return node;
 }
@@ -5574,7 +5574,7 @@ fn parseCPrimaryExprInner(c: *Context, m: *MacroCtx, scope: *Scope) ParseError!N
         .Identifier => {
             const mangled_name = scope.getAlias(slice);
             if (mem.startsWith(u8, mangled_name, "__builtin_") and !isBuiltinDefined(mangled_name)) {
-                try m.fail(c, "TODO implement function '{s}' in std.c.builtins", .{mangled_name});
+                try m.fail(c, "TODO implement function '{s}' in std.zig.c_builtins", .{mangled_name});
                 return error.ParseError;
             }
             const identifier = try Tag.identifier.create(c.arena, builtin_typedef_map.get(mangled_name) orelse mangled_name);
diff --git a/test/run_translated_c.zig b/test/run_translated_c.zig
index 4953896636..ef2fd187df 100644
--- a/test/run_translated_c.zig
+++ b/test/run_translated_c.zig
@@ -1243,7 +1243,7 @@ pub fn addCases(cases: *tests.RunTranslatedCContext) void {
         \\}
     , "");
 
-    // See __builtin_alloca_with_align comment in std.c.builtins
+    // See __builtin_alloca_with_align comment in std.zig.c_builtins
     cases.add("use of unimplemented builtin in unused function does not prevent compilation",
         \\#include <stdlib.h>
         \\void unused() {
diff --git a/test/translate_c.zig b/test/translate_c.zig
index 1ceaf15e5c..b75d3b5cac 100644
--- a/test/translate_c.zig
+++ b/test/translate_c.zig
@@ -3461,11 +3461,11 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
         \\pub const MAY_NEED_PROMOTION_OCT = @import("std").zig.c_translation.promoteIntLiteral(c_int, 0o20000000000, .octal);
     });
 
-    // See __builtin_alloca_with_align comment in std.c.builtins
+    // See __builtin_alloca_with_align comment in std.zig.c_builtins
     cases.add("demote un-implemented builtins",
         \\#define FOO(X) __builtin_alloca_with_align((X), 8)
     , &[_][]const u8{
-        \\pub const FOO = @compileError("TODO implement function '__builtin_alloca_with_align' in std.c.builtins");
+        \\pub const FOO = @compileError("TODO implement function '__builtin_alloca_with_align' in std.zig.c_builtins");
     });
 
     cases.add("null sentinel arrays when initialized from string literal. Issue #8256",