diff --git a/chc/cmdline/ParseManager.py b/chc/cmdline/ParseManager.py
index 8472c50..9e1b9f0 100644
--- a/chc/cmdline/ParseManager.py
+++ b/chc/cmdline/ParseManager.py
@@ -102,7 +102,7 @@ def __init__(
         self._verbose = verbose
         # compile to 32 bit or 64 bit platform (default 64 bit)
         self._tgtplatform = tgtplatform
-        if not (self.tgtplatform in ["-m64", "-m32"]):
+        if not (self.tgtplatform in ["", "-m64", "-m32"]):
             print(
                 "Warning: invalid target platform: "
                 + self.tgtplatform
@@ -252,8 +252,11 @@ def preprocess_file_with_cc(
             "-fno-inline",
             "-fno-builtin",
             "-E",
-            "-g",
-            self.tgtplatform,
+            "-g"
+        ]
+        if self.tgtplatform:
+            cmd.append(self.tgtplatform)
+        cmd += [
             "-o",
             ifilename,
             cfilename,
@@ -317,6 +320,8 @@ def get_platform_index(self, cmd: List[str]) -> int:
             return -1
 
     def set_platform(self, cmd: List[str]) -> None:
+        if not self.tgtplatform:
+            return
         index = self.get_platform_index(cmd)
         if index >= 0:
             platform = cmd[index]
diff --git a/chc/cmdline/c_file/cfileutil.py b/chc/cmdline/c_file/cfileutil.py
index 0075824..025213f 100644
--- a/chc/cmdline/c_file/cfileutil.py
+++ b/chc/cmdline/c_file/cfileutil.py
@@ -121,6 +121,7 @@ def cfile_parse_file(args: argparse.Namespace) -> NoReturn:
     pcfilename: str = os.path.abspath(args.filename)
     opttgtpath: Optional[str] = args.tgtpath
     keep_system_includes: bool = args.keep_system_includes
+    tgtplatform: str = args.target_platform
     loglevel: str = args.loglevel
     logfilename: Optional[str] = args.logfilename
     logfilemode: str = args.logfilemode
@@ -159,7 +160,11 @@ def cfile_parse_file(args: argparse.Namespace) -> NoReturn:
     chklogger.logger.info("Target path: %s", targetpath)
 
     parsemanager = ParseManager(
-        projectpath, projectname, targetpath, keep_system_includes=keep_system_includes)
+        projectpath,
+        projectname,
+        targetpath,
+        keep_system_includes=keep_system_includes,
+        tgtplatform=tgtplatform)
     parsemanager.remove_semantics()
     parsemanager.initialize_paths()
 
diff --git a/chc/cmdline/c_project/cprojectutil.py b/chc/cmdline/c_project/cprojectutil.py
index b268c25..00b3f24 100644
--- a/chc/cmdline/c_project/cprojectutil.py
+++ b/chc/cmdline/c_project/cprojectutil.py
@@ -118,6 +118,7 @@ def cproject_parse_project(args: argparse.Namespace) -> NoReturn:
     projectname: str = args.projectname
     opttgtpath: Optional[str] = args.tgtpath
     keep_system_includes: bool = args.keep_system_includes
+    tgtplatform: str = args.target_platform
     loglevel: str = args.loglevel
     logfilename: Optional[str] = args.logfilename
     logfilemode: str = args.logfilemode
@@ -168,7 +169,8 @@ def cproject_parse_project(args: argparse.Namespace) -> NoReturn:
         projectpath,
         projectname,
         targetpath,
-        keep_system_includes=keep_system_includes)
+        keep_system_includes=keep_system_includes,
+        tgtplatform=tgtplatform)
     parsemanager.remove_semantics()
     parsemanager.initialize_paths()
     exitcode = parsemanager.parse_with_ccommands(compilecommands, copyfiles=True)
diff --git a/chc/cmdline/chkc b/chc/cmdline/chkc
index 5848e0c..52dd862 100755
--- a/chc/cmdline/chkc
+++ b/chc/cmdline/chkc
@@ -663,6 +663,10 @@ def parse() -> argparse.Namespace:
         "--keep-system-includes",
         action="store_true",
         help="do not filter out functions from files with absolute file names")
+    cfileparse.add_argument(
+        "--target-platform",
+        default="-m64",
+        help="target platform argument for build system")
     cfileparse.add_argument(
         "--loglevel", "-log",
         choices=UL.LogLevel.options(),
@@ -1491,6 +1495,10 @@ def parse() -> argparse.Namespace:
         "--keep-system-includes",
         action="store_true",
         help="don't filter out functions from files with absolute filenames")
+    cprojectparse.add_argument(
+        "--target-platform",
+        default="-m64",
+        help="target platform argument for build system")
     cprojectparse.add_argument(
         "--loglevel", "-log",
         choices=UL.LogLevel.options(),