diff --git a/include/lib/extensions/spe.h b/include/lib/extensions/spe.h
index bbfbd19..4801a22 100644
--- a/include/lib/extensions/spe.h
+++ b/include/lib/extensions/spe.h
@@ -12,12 +12,16 @@
 
 #if ENABLE_SPE_FOR_NS
 void spe_enable(cpu_context_t *ctx);
+void spe_disable(cpu_context_t *ctx);
 void spe_init_el2_unused(void);
 void spe_stop(void);
 #else
 static inline void spe_enable(cpu_context_t *ctx)
 {
 }
+static inline void spe_disable(cpu_context_t *ctx)
+{
+}
 static inline void spe_init_el2_unused(void)
 {
 }