diff --git a/src/preprocessor.cpp b/src/preprocessor.cpp
index f19aa80ef..dc8d77392 100644
--- a/src/preprocessor.cpp
+++ b/src/preprocessor.cpp
@@ -779,6 +779,8 @@ std::list<std::string> Preprocessor::getcfgs(const std::string &filedata)
             ++it;
     }
 
+    ret.sort();
+
     return ret;
 }
 
diff --git a/src/preprocessor.h b/src/preprocessor.h
index 001e1b12d..a42c33ee8 100644
--- a/src/preprocessor.h
+++ b/src/preprocessor.h
@@ -118,7 +118,8 @@ private:
     static std::string removeSpaceNearNL(const std::string &str);
 
     /**
-     * Get all possible configurations. By looking at the ifdefs and ifndefs in filedata
+     * Get all possible configurations sorted in alphabetical order.
+     * By looking at the ifdefs and ifndefs in filedata
      */
     std::list<std::string> getcfgs(const std::string &filedata);