diff --git a/src/lib/onesource.cpp b/src/lib/onesource.cpp
index 8cc06a9..ff85d43 100644
--- a/src/lib/onesource.cpp
+++ b/src/lib/onesource.cpp
@@ -775,9 +775,10 @@ void onesource::fitIR(vector<SED *> &fulllibIR,
       }
     }
 
-// Catch the name of the local thread in the parallelisation
+    // Catch the name of the local thread in the parallelisation
+    int thread_id = 0;
 #ifdef _OPENMP
-    int thread_id = omp_get_thread_num();
+    thread_id = omp_get_thread_num();
 #pragma omp for
 #endif
     // Loop over all SEDs from the library