diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b743e2b86..607741b807 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Current develop
 
+### Fixed (issue #227)
+- [[PR228]](https://github.com/lanl/singularity-eos/pull/228) added untracked header files in cmake
+
 ### Added (entropy calculation for stellar collapse eos)
 - [[PR226]](https://github.com/lanl/singularity-eos/pull/226) added entropy interpolation to stellar collapse eos
 
diff --git a/singularity-eos/CMakeLists.txt b/singularity-eos/CMakeLists.txt
index cff8cba22b..c4547279f2 100644
--- a/singularity-eos/CMakeLists.txt
+++ b/singularity-eos/CMakeLists.txt
@@ -13,27 +13,32 @@
 #------------------------------------------------------------------------------#
 
 set(EOS_HEADERS
-    base/constants.hpp
-    base/eos_error.hpp
+    closure/mixed_cell_models.hpp
     base/fast-math/logs.hpp
-    base/math_utils.hpp
     base/robust_utils.hpp
     base/root-finding-1d/root_finding.hpp
+    base/variadic_utils.hpp
+    base/math_utils.hpp
+    base/constants.hpp
+    base/eos_error.hpp
+    base/sp5/singularity_eos_sp5.hpp
     eos/eos.hpp
-    eos/eos_builder.hpp
+    eos/eos_variant.hpp
+    eos/singularity_eos.hpp
+    eos/eos_stellar_collapse.hpp
+    eos/eos_ideal.hpp
+    eos/eos_spiner.hpp
     eos/eos_davis.hpp
-    eos/eos_eospac.hpp
     eos/eos_gruneisen.hpp
-    eos/eos_ideal.hpp
+    eos/eos_builder.hpp
     eos/eos_jwl.hpp
-    eos/eos_spiner.hpp
-    eos/eos_stellar_collapse.hpp
-    eos/eos_variant.hpp
-    eos/modifiers/eos_unitsystem.hpp
-    eos/modifiers/ramps_eos.hpp
+    eos/modifiers/relativistic_eos.hpp
     eos/modifiers/scaled_eos.hpp
+    eos/modifiers/ramps_eos.hpp
     eos/modifiers/shifted_eos.hpp
-    eos/modifiers/relativistic_eos.hpp
+    eos/modifiers/eos_unitsystem.hpp
+    eos/eos_base.hpp
+    eos/eos_eospac.hpp
 )
 
 set(EOS_SRCS