diff -r b9715d7317c1 -r 8f0a3c00d1d2 src/array.c
--- a/src/array.c	Thu Jul 11 10:11:43 2019 +0200
+++ b/src/array.c	Tue Aug 06 16:26:46 2019 +0200
@@ -223,7 +223,7 @@
         return;
     }
   
-    // we need memory for one element
+    /* we need memory for one element */
     void *value = malloc(array->elemsize);
     
     while (start <= mid && rightstart <= end) { 
@@ -231,16 +231,16 @@
                 ucx_array_at(*array, rightstart), data) <= 0) { 
             start++; 
         } else {
-            // save the value from the right
+            /* save the value from the right */
             memcpy(value, ucx_array_at(*array, rightstart), array->elemsize);
                         
-            // shift all left elements one element to the right
+            /* shift all left elements one element to the right */
             size_t shiftcount = rightstart-start;
             void *startptr = ucx_array_at(*array, start);
             void *dest = ucx_array_at(*array, start+1);
             memmove(dest, startptr, shiftcount*array->elemsize);
             
-            // bring the first value from the right to the left
+            /* bring the first value from the right to the left */
             memcpy(startptr, value, array->elemsize);
   
             start++; 
@@ -249,7 +249,7 @@
         }
     }
     
-    // free the temporary memory
+    /* free the temporary memory */
     free(value);
 }