diff --git a/makepanda/makewheel.py b/makepanda/makewheel.py
index 5be77f4b5c..c0fe650fdf 100644
--- a/makepanda/makewheel.py
+++ b/makepanda/makewheel.py
@@ -635,11 +635,16 @@ def makewheel(version, output_dir, platform=None):
         whl.ignore_deps.update(MANYLINUX_LIBS)
 
     # Add libpython for deployment.
+    suffix = ''
+    gil_disabled = get_config_var("Py_GIL_DISABLED")
+    if gil_disabled and int(gil_disabled):
+        suffix = 't'
+
     if sys.platform in ('win32', 'cygwin'):
-        pylib_name = 'python{0}{1}.dll'.format(*sys.version_info)
+        pylib_name = 'python{0}{1}{2}.dll'.format(sys.version_info[0], sys.version_info[1], suffix)
         pylib_path = os.path.join(get_config_var('BINDIR'), pylib_name)
     elif sys.platform == 'darwin':
-        pylib_name = 'libpython{0}.{1}.dylib'.format(*sys.version_info)
+        pylib_name = 'libpython{0}.{1}{2}.dylib'.format(sys.version_info[0], sys.version_info[1], suffix)
         pylib_path = os.path.join(get_config_var('LIBDIR'), pylib_name)
     else:
         pylib_name = get_config_var('LDLIBRARY')