diff --git a/include/lib/extensions/mpam.h b/include/lib/extensions/mpam.h
index 120a921..4327278 100644
--- a/include/lib/extensions/mpam.h
+++ b/include/lib/extensions/mpam.h
@@ -12,7 +12,7 @@
 #if ENABLE_MPAM_FOR_LOWER_ELS
 void mpam_enable(bool el2_unused);
 #else
-void mpam_enable(bool el2_unused)
+static inline void mpam_enable(bool el2_unused)
 {
 }
 #endif