diff --git a/benchmarks/dhrystone/dhrystone.c b/benchmarks/dhrystone/dhrystone.c
index 38e33764f..7d3306344 100644
--- a/benchmarks/dhrystone/dhrystone.c
+++ b/benchmarks/dhrystone/dhrystone.c
@@ -17,7 +17,7 @@ extern  int     Int_Glob;
 extern  char    Ch_1_Glob;
 
 
-Proc_6 (Enum_Val_Par, Enum_Ref_Par)
+void Proc_6 (Enum_Val_Par, Enum_Ref_Par)
 /*********************************/
     /* executed once */
     /* Enum_Val_Par == Ident_3, Enum_Ref_Par becomes Ident_2 */
@@ -51,7 +51,7 @@ Enumeration *Enum_Ref_Par;
 } /* Proc_6 */
 
 
-Proc_7 (Int_1_Par_Val, Int_2_Par_Val, Int_Par_Ref)
+void Proc_7 (Int_1_Par_Val, Int_2_Par_Val, Int_Par_Ref)
 /**********************************************/
     /* executed three times                                      */ 
     /* first call:      Int_1_Par_Val == 2, Int_2_Par_Val == 3,  */
@@ -71,7 +71,7 @@ One_Fifty      *Int_Par_Ref;
 } /* Proc_7 */
 
 
-Proc_8 (Arr_1_Par_Ref, Arr_2_Par_Ref, Int_1_Par_Val, Int_2_Par_Val)
+void Proc_8 (Arr_1_Par_Ref, Arr_2_Par_Ref, Int_1_Par_Val, Int_2_Par_Val)
 /*********************************************************************/
     /* executed once      */
     /* Int_Par_Val_1 == 3 */
diff --git a/benchmarks/dhrystone/dhrystone.h b/benchmarks/dhrystone/dhrystone.h
index e350c1778..b5cb9fe22 100644
--- a/benchmarks/dhrystone/dhrystone.h
+++ b/benchmarks/dhrystone/dhrystone.h
@@ -351,6 +351,7 @@
  ***************************************************************************
  */
 
+
 /* Compiler and system dependent definitions: */
 
 /* variables for time measurement: */
@@ -475,3 +476,16 @@ typedef struct record
       } Rec_Type, *Rec_Pointer;
 
 #endif
+
+
+/* Defining the function definations */
+void Proc_1(Rec_Pointer Ptr_Val_Par);
+void Proc_2(One_Fifty *Int_Par_Ref);
+void Proc_3(Rec_Pointer *Ptr_Ref_Par);
+void Proc_4(void);
+void Proc_5(void);
+void Proc_6(Enumeration Enum_Val_Par, Enumeration *Enum_Ref_Par);
+void Proc_7(One_Fifty Int_1_Par_Val, One_Fifty Int_2_Par_Val, One_Fifty *Int_Par_Ref);
+void Proc_8(Arr_1_Dim Arr_1_Par_Ref, Arr_2_Dim Arr_2_Par_Ref, int Int_1_Par_Val, int Int_2_Par_Val);
+Boolean Func_2(Str_30 Str_1_Par_Ref, Str_30 Str_2_Par_Ref);
+Boolean Func_3(Enumeration Enum_Par_Val);
diff --git a/benchmarks/dhrystone/dhrystone_main.c b/benchmarks/dhrystone/dhrystone_main.c
index 9c7bcf544..fd7568523 100644
--- a/benchmarks/dhrystone/dhrystone_main.c
+++ b/benchmarks/dhrystone/dhrystone_main.c
@@ -239,7 +239,7 @@ int main (int argc, char** argv)
 }
 
 
-Proc_1 (Ptr_Val_Par)
+void Proc_1 (Ptr_Val_Par)
 /******************/
 
 REG Rec_Pointer Ptr_Val_Par;
@@ -273,7 +273,7 @@ REG Rec_Pointer Ptr_Val_Par;
 } /* Proc_1 */
 
 
-Proc_2 (Int_Par_Ref)
+void Proc_2 (Int_Par_Ref)
 /******************/
     /* executed once */
     /* *Int_Par_Ref == 1, becomes 4 */
@@ -296,7 +296,7 @@ One_Fifty   *Int_Par_Ref;
 } /* Proc_2 */
 
 
-Proc_3 (Ptr_Ref_Par)
+void Proc_3 (Ptr_Ref_Par)
 /******************/
     /* executed once */
     /* Ptr_Ref_Par becomes Ptr_Glob */
@@ -311,7 +311,7 @@ Rec_Pointer *Ptr_Ref_Par;
 } /* Proc_3 */
 
 
-Proc_4 () /* without parameters */
+void Proc_4 () /* without parameters */
 /*******/
     /* executed once */
 {
@@ -323,7 +323,7 @@ Proc_4 () /* without parameters */
 } /* Proc_4 */
 
 
-Proc_5 () /* without parameters */
+void Proc_5 () /* without parameters */
 /*******/
     /* executed once */
 {