diff --git a/test/function_arith_cxx98.cpp b/test/function_arith_cxx98.cpp
index 65ea0a7..2032bf4 100644
--- a/test/function_arith_cxx98.cpp
+++ b/test/function_arith_cxx98.cpp
@@ -36,4 +36,6 @@ f = 0;
     
   f = &mul_ints;
 
+  
+    return 0;
 }
diff --git a/test/function_arith_portable.cpp b/test/function_arith_portable.cpp
index 0f43f61..7556b2d 100644
--- a/test/function_arith_portable.cpp
+++ b/test/function_arith_portable.cpp
@@ -34,4 +34,6 @@ f = 0;
     
   f = &mul_ints;
 
+
+    return 0;
 }
diff --git a/test/function_ref_cxx98.cpp b/test/function_ref_cxx98.cpp
index 8327ccb..7ec29bf 100644
--- a/test/function_ref_cxx98.cpp
+++ b/test/function_ref_cxx98.cpp
@@ -15,4 +15,6 @@ int main()
 
   boost::function<int (int)> f2(f);
 
+
+    return 0;
 }
diff --git a/test/function_ref_portable.cpp b/test/function_ref_portable.cpp
index 86801a7..1692a84 100644
--- a/test/function_ref_portable.cpp
+++ b/test/function_ref_portable.cpp
@@ -15,4 +15,6 @@ int main()
 
   boost::function1<int, int> f2(f);
 
+
+    return 0;
 }
diff --git a/test/mem_fun_cxx98.cpp b/test/mem_fun_cxx98.cpp
index 2fc327e..7574bba 100644
--- a/test/mem_fun_cxx98.cpp
+++ b/test/mem_fun_cxx98.cpp
@@ -21,4 +21,6 @@ f = &X::foo;
 X x;
 f(&x, 5);
 
+
+    return 0;
 }
diff --git a/test/mem_fun_portable.cpp b/test/mem_fun_portable.cpp
index 95fd9c7..fb4eed5 100644
--- a/test/mem_fun_portable.cpp
+++ b/test/mem_fun_portable.cpp
@@ -21,4 +21,6 @@ f = &X::foo;
 X x;
 f(&x, 5);
 
+
+    return 0;
 }
diff --git a/test/std_bind_cxx98.cpp b/test/std_bind_cxx98.cpp
index e8b318c..6cf1e97 100644
--- a/test/std_bind_cxx98.cpp
+++ b/test/std_bind_cxx98.cpp
@@ -20,4 +20,6 @@ int main()
 
   f(5); // Call x.foo(5)
 
+
+    return 0;
 }
diff --git a/test/std_bind_portable.cpp b/test/std_bind_portable.cpp
index 418d03b..d4a7fdd 100644
--- a/test/std_bind_portable.cpp
+++ b/test/std_bind_portable.cpp
@@ -20,4 +20,6 @@ int main()
 
   f(5); // Call x.foo(5)
 
+
+    return 0;
 }
diff --git a/test/sum_avg_cxx98.cpp b/test/sum_avg_cxx98.cpp
index c18fa5a..9f14ae0 100644
--- a/test/sum_avg_cxx98.cpp
+++ b/test/sum_avg_cxx98.cpp
@@ -20,4 +20,6 @@ boost::function<void (int values[], int n, int& sum, float& avg)> sum_avg;
     
 sum_avg = &do_sum_avg;
 
+
+    return 0;
 }
diff --git a/test/sum_avg_portable.cpp b/test/sum_avg_portable.cpp
index 6e6518d..d33a505 100644
--- a/test/sum_avg_portable.cpp
+++ b/test/sum_avg_portable.cpp
@@ -20,4 +20,6 @@ boost::function4<void, int[], int, int&, float> sum_avg;
     
 sum_avg = &do_sum_avg;
 
+
+    return 0;
 }