diff --git a/runtime/include/smc-handler.h b/runtime/include/smc-handler.h
index fb42e6b..1d6a41a 100644
--- a/runtime/include/smc-handler.h
+++ b/runtime/include/smc-handler.h
@@ -11,7 +11,7 @@
 unsigned long smc_version(void);
 
 void smc_read_feature_register(unsigned long index,
-				struct smc_result *ret_struct);
+				struct smc_result *res);
 
 unsigned long smc_data_create(unsigned long rd_addr,
 			      unsigned long data_addr,
@@ -25,7 +25,7 @@
 
 void smc_data_destroy(unsigned long rd_addr,
 		      unsigned long map_addr,
-		      struct smc_result *ret_struct);
+		      struct smc_result *res);
 
 unsigned long smc_granule_delegate(unsigned long addr);
 
@@ -48,7 +48,7 @@
 			    unsigned long rec_run_addr);
 
 void smc_rec_aux_count(unsigned long rd_addr,
-			struct smc_result *ret_struct);
+			struct smc_result *res);
 
 unsigned long smc_rtt_create(unsigned long rd_addr,
 			     unsigned long rtt_addr,
@@ -58,12 +58,12 @@
 void smc_rtt_destroy(unsigned long rd_addr,
 		     unsigned long map_addr,
 		     unsigned long ulevel,
-		     struct smc_result *ret_struct);
+		     struct smc_result *res);
 
 void smc_rtt_fold(unsigned long rd_addr,
 		  unsigned long map_addr,
 		  unsigned long ulevel,
-		  struct smc_result *ret_struct);
+		  struct smc_result *res);
 
 unsigned long smc_rtt_map_unprotected(unsigned long rd_addr,
 				      unsigned long map_addr,
@@ -78,7 +78,7 @@
 void smc_rtt_read_entry(unsigned long rd_addr,
 			unsigned long map_addr,
 			unsigned long ulevel,
-			struct smc_result *ret_struct);
+			struct smc_result *res);
 
 unsigned long smc_psci_complete(unsigned long calling_rec_addr,
 				unsigned long target_rec_addr);
@@ -92,6 +92,6 @@
 			unsigned long rec_addr,
 			unsigned long base,
 			unsigned long top,
-			struct smc_result *ret_struct);
+			struct smc_result *res);
 
 #endif /* SMC_HANDLER_H */