diff --git a/scripts/mbedtls_framework/c_wrapper_generator.py b/scripts/mbedtls_framework/c_wrapper_generator.py
index c08913326..f2d29aa4e 100644
--- a/scripts/mbedtls_framework/c_wrapper_generator.py
+++ b/scripts/mbedtls_framework/c_wrapper_generator.py
@@ -11,7 +11,6 @@
 import os
 import re
 import sys
-import inspect
 from typing import Dict, NamedTuple, List, Optional, Tuple
 
 from .c_parsing_helper import ArgumentInfo, FunctionInfo
@@ -31,9 +30,16 @@ WrapperInfo = NamedTuple('WrapperInfo', [
     ('wrapper_name', str),
 ])
 
-def blockstr_format(in_str: str, new_lines: int = 1) -> str:
-    """Return a whitespace stripped str, appended with user defined empty lines."""
-    return inspect.cleandoc(in_str) + ("\n" * (new_lines + 1))
+def strip_indentation(in_str: str, new_lines: int = 1, ident_lv: int = 4) -> str:
+    """Return a whitespace stripped str, appended with user defined empty lines.
+
+    The method will remove (ident_lv * 4) space-character identations from
+    input string. It will also remove all whitespace around the text-block.
+    At the end of the stream a `new_lines` ammount of empty lines will be added.
+    """
+
+    return re.sub(r"(?m)^ {{{ident}}}".format(ident=ident_lv * 4), "",
+                  in_str.strip()) + ("\n" * (new_lines + 1))
 
 class Base:
     """Generate a C source file containing wrapper functions."""
@@ -70,17 +76,17 @@ class Base:
 
         This includes a description comment and some include directives.
         """
-        prologue = blockstr_format(f'''
+        prologue = strip_indentation(f'''
             /* Automatically generated by {self.program_name}, do not edit! */
 
             /* Copyright The Mbed TLS Contributors
              * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
              */
 
-        ''')
+        ''', ident_lv=3)
 
         if header:
-            prologue += blockstr_format(f'''
+            prologue += strip_indentation(f'''
                 #ifndef {self.header_guard}
                 #define {self.header_guard}
 
@@ -102,7 +108,7 @@ class Base:
         """Write the epilogue of a C file."""
         epilogue = ""
         if header:
-            epilogue += blockstr_format(f'''
+            epilogue += strip_indentation(f'''
                 #ifdef __cplusplus
                 }}
                 #endif