diff --git a/src/EC/ThreadPool.hpp b/src/EC/ThreadPool.hpp
index d3808ec..3b68c6b 100644
--- a/src/EC/ThreadPool.hpp
+++ b/src/EC/ThreadPool.hpp
@@ -175,7 +175,7 @@ public:
     /*!
         \brief Returns the ThreadCount that this class was created with.
      */
-    unsigned int getThreadCount() {
+    constexpr unsigned int getThreadCount() {
         return SIZE;
     }