diff --git a/src/PrimordialChem/test_primordial_chem.cpp b/src/PrimordialChem/test_primordial_chem.cpp
index 401ad4a9a..8e6409dd6 100644
--- a/src/PrimordialChem/test_primordial_chem.cpp
+++ b/src/PrimordialChem/test_primordial_chem.cpp
@@ -29,7 +29,7 @@
 #include "radiation_system.hpp"
 #include "test_primordial_chem.hpp"
 
-#include"actual_eos_data.H"
+#include "actual_eos_data.H"
 #include "burn_type.H"
 #include "eos.H"
 #include "extern_parameters.H"