compilation.md

@@ -13,7 +13,7 @@ Then depending on your operating system follow the directions:
 * [Unix/MacOs] (#compile)
 * [Windows] (#precompiled)
 
-If an error arise during the compilation step please first check if there is not a solution
+If an error arises during the compilation step please first check if there is not a solution
 in the [FAQ](Faq#compile_error)
 
 ## <a name=compile> Unix and MacOs </a> ##