diff --git a/include/parser.hpp b/include/parser.hpp
index 029c9c2..05e5971 100644
--- a/include/parser.hpp
+++ b/include/parser.hpp
@@ -39,6 +39,22 @@
 
 enum RunMode { NONE, GPU_THREADED, CPU, GPU_MPI };
 
+/**
+ * @brief this allows the use of isnan() for int
+ * in the template function fileToVector()
+ */
+inline bool isnan(int i){
+    return false;
+}
+
+/**
+ * @brief this allows the use of isnan() for unsigned
+ * in the template function fileToVector()
+ */
+inline bool isnan(unsigned i){
+    return false;
+}
+
 /**
  * @brief Parses a given file(filename) line by line.
  *        Each line should contain just one value