diff --git a/libc/newhdrgen/class_implementation/classes/function.py b/libc/newhdrgen/class_implementation/classes/function.py
index ea5e8223a538ef..845ef1aebf54b8 100644
--- a/libc/newhdrgen/class_implementation/classes/function.py
+++ b/libc/newhdrgen/class_implementation/classes/function.py
@@ -26,7 +26,7 @@ def __str__(self):
         attributes_str = " ".join(self.attributes)
         arguments_str = ", ".join(self.arguments)
         if attributes_str == "":
-            result = f"{self.return_type} {self.name}({arguments_str}) __NOEXCEPT;"
+            result = f"{self.return_type} {self.name}({arguments_str})"
         else:
-            result = f"{attributes_str} {self.return_type} {self.name}({arguments_str}) __NOEXCEPT;"
+            result = f"{attributes_str} {self.return_type} {self.name}({arguments_str})"
         return result
diff --git a/libc/newhdrgen/header.py b/libc/newhdrgen/header.py
index 2671f00d7e47a4..d1f0fe96dbc60d 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))
+                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))
+                    content.append(str(function) + "__NOEXCEPT;")
                     content.append("")
                 elif current_guard == function.guard:
-                    content.append(str(function))
+                    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))
+                    content.append(str(function) + "__NOEXCEPT;")
                     content.append("")
         if current_guard != None:
             content.pop()