diff --git a/targets/ARCH/COMMON/common_lib.h b/targets/ARCH/COMMON/common_lib.h
index 203d38767a6ea3fed6b27f689374bd489a764c8f..fccb5765fed36788f40a6fda0e5915169583b8fb 100644
--- a/targets/ARCH/COMMON/common_lib.h
+++ b/targets/ARCH/COMMON/common_lib.h
@@ -73,9 +73,11 @@ extern "C"
 {
 /* return 0 if OK, < 0 if error */
 int openair0_device_init(openair0_device* device, openair0_config_t *openair0_cfg);
+openair0_timestamp get_usrp_time(openair0_device *device);
 }
 #else
 int openair0_device_init(openair0_device* device, openair0_config_t *openair0_cfg);
+openair0_timestamp get_usrp_time(openair0_device *device);
 #endif
 
 #endif // COMMON_LIB_H