diff --git a/tools/export/exporters.py b/tools/export/exporters.py
index 1286ac57f9..0b074ef6ea 100644
--- a/tools/export/exporters.py
+++ b/tools/export/exporters.py
@@ -62,6 +62,7 @@ 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 5c52a3d1ec..e8f944cded 100644
--- a/tools/export/iar.py
+++ b/tools/export/iar.py
@@ -76,6 +76,8 @@ 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])
         # VLA is enabled via template IccAllowVLA
         project_data['tool_specific']['iar']['misc']['c_flags'].remove("--vla")
         project_data['common']['build_dir'] = os.path.join(project_data['common']['build_dir'], 'iar_arm')