diff --git a/tools/create_gbl.py b/tools/create_gbl.py
index 4167c56a..f7af0fdf 100755
--- a/tools/create_gbl.py
+++ b/tools/create_gbl.py
@@ -199,9 +199,11 @@ def main():
     if "ot_rcp_version" in gbl_dynamic:
         gbl_dynamic.remove("ot_rcp_version")
         openthread_config_h = parse_c_header_defines(
-            (project_root / "config/sl_openthread_generic_config.h").read_text()
+            (
+                gsdk_path / "protocol/openthread/include/sl_openthread_package_info.h"
+            ).read_text()
         )
-        metadata["ot_rcp_version"] = openthread_config_h["PACKAGE_STRING"]
+        metadata["ot_rcp_version"] = openthread_config_h["PACKAGE_VERSION"]
 
     if "gecko_bootloader_version" in gbl_dynamic:
         gbl_dynamic.remove("gecko_bootloader_version")