diff --git a/include/lib/extensions/spe.h b/include/lib/extensions/spe.h
index 02fccae..7b39037 100644
--- a/include/lib/extensions/spe.h
+++ b/include/lib/extensions/spe.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -10,15 +10,19 @@
 #include <stdbool.h>
 
 #if ENABLE_SPE_FOR_NS
-void spe_enable(bool el2_unused);
+void spe_init_el3(void);
+void spe_init_el2_unused(void);
 void spe_disable(void);
 #else
-static inline void spe_enable(bool el2_unused)
+static inline void spe_init_el3(void)
 {
 }
+static inline void spe_init_el2_unused(void)
+{
+}
 static inline void spe_disable(void)
 {
 }
-#endif
+#endif /* ENABLE_SPE_FOR_NS */
 
 #endif /* SPE_H */