diff --git a/recipes/onetbb/2020.x/conanfile.py b/recipes/onetbb/2020.x/conanfile.py
index 8dfe37c3465d58..44e997a54e6e3f 100644
--- a/recipes/onetbb/2020.x/conanfile.py
+++ b/recipes/onetbb/2020.x/conanfile.py
@@ -1,3 +1,4 @@
+import glob
 import os
 import textwrap
 
@@ -205,6 +206,9 @@ def _patch_sources(self):
         replace_in_file(self, linux_include, "= gcc", "= $(CC)")
         if self.version != "2019_u9" and self.settings.build_type == "Debug":
             replace_in_file(self, os.path.join(self.source_folder, "Makefile"), "release", "debug")
+        for inc_file in glob.glob(os.path.join(self.source_folder, "build", "*.inc")):
+            # Fix 'ar: two different operation options specified' due to unrecognized -m64 flag in 2020.04
+            replace_in_file(self, inc_file, "LIB_LINK_FLAGS += -m64", "LIB_LINK_FLAGS += ", strict=False)
 
     def build(self):
         self._patch_sources()