diff --git a/include/lib/extensions/sme.h b/include/lib/extensions/sme.h
index 0e9c4b9..dbefdfc 100644
--- a/include/lib/extensions/sme.h
+++ b/include/lib/extensions/sme.h
@@ -22,11 +22,19 @@
 
 #if ENABLE_SME_FOR_NS
 void sme_enable(cpu_context_t *context);
+void sme_init_el3(void);
+void sme_init_el2_unused(void);
 void sme_disable(cpu_context_t *context);
 #else
 static inline void sme_enable(cpu_context_t *context)
 {
 }
+static inline void sme_init_el3(void)
+{
+}
+static inline void sme_init_el2_unused(void)
+{
+}
 static inline void sme_disable(cpu_context_t *context)
 {
 }