diff --git a/example/opencv_convolution.cpp b/example/opencv_convolution.cpp
index 4446dc9a..7ba53436 100644
--- a/example/opencv_convolution.cpp
+++ b/example/opencv_convolution.cpp
@@ -36,7 +36,7 @@ const char source[] = BOOST_COMPUTE_STRINGIZE_SOURCE (
                                   CLK_ADDRESS_CLAMP_TO_EDGE   |
                                   CLK_FILTER_NEAREST;
 
-        // Store each work-item’s unique row and column
+        // Store each work-item's unique row and column
         int x   = get_global_id(0);
         int y   = get_global_id(1);
 
@@ -158,7 +158,7 @@ int main(int argc, char *argv[])
     {
         std::cout<<"Build Error: "<<std::endl
                  <<filter_program.build_log();
-	return -1;
+    return -1;
     }
 
     // create fliter kernel and set arguments
diff --git a/example/opencv_optical_flow.cpp b/example/opencv_optical_flow.cpp
index 11d012ba..61e1ada3 100644
--- a/example/opencv_optical_flow.cpp
+++ b/example/opencv_optical_flow.cpp
@@ -45,8 +45,8 @@ const char source[] = BOOST_COMPUTE_STRINGIZE_SOURCE (
         float4 previous_pixel   = read_imagef(previous_image,
                                               sampler,
                                               coords);
-        int2 x1 	= (int2)(offset, 0.f);
-        int2 y1 	= (int2)(0.f, offset);
+        int2 x1     = (int2)(offset, 0.f);
+        int2 y1     = (int2)(0.f, offset);
 
         //get the difference
         float4 curdif = previous_pixel - current_pixel;
diff --git a/test/test_is_permutation.cpp b/test/test_is_permutation.cpp
index 4859e7c2..881084eb 100644
--- a/test/test_is_permutation.cpp
+++ b/test/test_is_permutation.cpp
@@ -31,7 +31,7 @@ BOOST_AUTO_TEST_CASE(is_permutation_int)
     bc::vector<bc::int_> vector2(dataset2, dataset2 + 5, queue);
 
     bool result =
-    	bc::is_permutation(vector1.begin(), vector1.begin() + 5,
+        bc::is_permutation(vector1.begin(), vector1.begin() + 5,
                            vector2.begin(), vector2.begin() + 5, queue);
 
     BOOST_VERIFY(result == true);
diff --git a/test/test_next_permutation.cpp b/test/test_next_permutation.cpp
index 06dcde51..b76c3811 100644
--- a/test/test_next_permutation.cpp
+++ b/test/test_next_permutation.cpp
@@ -28,7 +28,7 @@ BOOST_AUTO_TEST_CASE(next_permutation_int)
     bc::vector<bc::int_> vector(dataset, dataset + 5, queue);
 
     bool result =
-    	bc::next_permutation(vector.begin(), vector.begin() + 5, queue);
+        bc::next_permutation(vector.begin(), vector.begin() + 5, queue);
 
     CHECK_RANGE_EQUAL(int, 5, vector, (1, 3, 4, 5, 2));
     BOOST_VERIFY(result == true);
@@ -47,7 +47,7 @@ BOOST_AUTO_TEST_CASE(next_permutation_string)
     bc::vector<bc::char_> vector(dataset, dataset + 4, queue);
 
     bool result =
-    	bc::next_permutation(vector.begin(), vector.begin() + 4, queue);
+        bc::next_permutation(vector.begin(), vector.begin() + 4, queue);
 
     CHECK_RANGE_EQUAL(char, 4, vector, ('a', 'a', 'b', 'a'));
     BOOST_VERIFY(result == true);
diff --git a/test/test_prev_permutation.cpp b/test/test_prev_permutation.cpp
index cfb5a851..b6edf4cf 100644
--- a/test/test_prev_permutation.cpp
+++ b/test/test_prev_permutation.cpp
@@ -28,7 +28,7 @@ BOOST_AUTO_TEST_CASE(prev_permutation_int)
     bc::vector<bc::int_> vector(dataset, dataset + 5, queue);
 
     bool result =
-    	bc::prev_permutation(vector.begin(), vector.begin() + 5, queue);
+        bc::prev_permutation(vector.begin(), vector.begin() + 5, queue);
 
     CHECK_RANGE_EQUAL(int, 5, vector, (1, 3, 2, 5, 4));
     BOOST_VERIFY(result == true);
@@ -47,7 +47,7 @@ BOOST_AUTO_TEST_CASE(prev_permutation_string)
     bc::vector<bc::char_> vector(dataset, dataset + 4, queue);
 
     bool result =
-    	bc::prev_permutation(vector.begin(), vector.begin() + 4, queue);
+        bc::prev_permutation(vector.begin(), vector.begin() + 4, queue);
 
     CHECK_RANGE_EQUAL(char, 4, vector, ('a', 'b', 'a', 'a'));
     BOOST_VERIFY(result == true);