diff --git a/tools/export/exporters.py b/tools/export/exporters.py
index 8bd76749f3..69c6e23be6 100644
--- a/tools/export/exporters.py
+++ b/tools/export/exporters.py
@@ -62,7 +62,6 @@ class Exporter(object):
             if self.config_header:
                 self._progen_flag_cache['c_flags'] += self.toolchain.get_config_option(self.config_header)
                 self._progen_flag_cache['cxx_flags'] += self.toolchain.get_config_option(self.config_header)
-                self._progen_flag_cache['asm_flags'] += self.toolchain.get_config_option(self.config_header)
         return self._progen_flag_cache
 
     def __scan_and_copy(self, src_path, trg_path):
diff --git a/tools/export/iar.py b/tools/export/iar.py
index 4461451718..f34ad7fbb1 100644
--- a/tools/export/iar.py
+++ b/tools/export/iar.py
@@ -76,8 +76,6 @@ class IAREmbeddedWorkbench(Exporter):
         project_data['tool_specific']['iar'].setdefault("misc", {})
         project_data['tool_specific']['iar'].update(tool_specific['iar'])
         project_data['tool_specific']['iar']['misc'].update(self.progen_flags)
-        project_data['tool_specific']['iar']['misc']['asm_flags'].remove(
-            self.toolchain.get_config_option(self.config_header)[0])
         project_data['tool_specific']['iar']['misc']['asm_flags'].extend(
             ['-D%s' % d for d in self.toolchain.get_symbols()])
         # VLA is enabled via template IccAllowVLA