diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h
index 714f6e0..c087dc6 100644
--- a/include/plat/common/platform.h
+++ b/include/plat/common/platform.h
@@ -165,7 +165,7 @@
 /*******************************************************************************
  * Optional BL3-1 functions (may be overridden)
  ******************************************************************************/
-void bl31_plat_enable_mmu();
+void bl31_plat_enable_mmu(void);
 
 /*******************************************************************************
  * Mandatory BL3-2 functions (only if platform contains a BL3-2)
@@ -175,6 +175,6 @@
 /*******************************************************************************
  * Optional BL3-2 functions (may be overridden)
  ******************************************************************************/
-void bl32_plat_enable_mmu();
+void bl32_plat_enable_mmu(void);
 
 #endif /* __PLATFORM_H__ */