diff --git a/libc/newhdrgen/header.py b/libc/newhdrgen/header.py
index 69de81eebb7198..141e3c9b2736b6 100644
--- a/libc/newhdrgen/header.py
+++ b/libc/newhdrgen/header.py
@@ -60,16 +60,16 @@ def __str__(self):
         current_guard = None
         for function in self.functions:
             if function.guard == None:
-                content.append(str(function) + "__NOEXCEPT")
+                content.append(str(function) + " __NOEXCEPT;")
                 content.append("")
             else:
                 if current_guard == None:
                     current_guard = function.guard
                     content.append(f"#ifdef {current_guard}")
-                    content.append(str(function) + "__NOEXCEPT")
+                    content.append(str(function) + " __NOEXCEPT;")
                     content.append("")
                 elif current_guard == function.guard:
-                    content.append(str(function) + "__NOEXCEPT")
+                    content.append(str(function) + " __NOEXCEPT;")
                     content.append("")
                 else:
                     content.pop()
@@ -77,7 +77,7 @@ def __str__(self):
                     content.append("")
                     current_guard = function.guard
                     content.append(f"#ifdef {current_guard}")
-                    content.append(str(function) + "__NOEXCEPT")
+                    content.append(str(function) + " __NOEXCEPT;")
                     content.append("")
         if current_guard != None:
             content.pop()