diff --git a/CMakeLists.txt b/CMakeLists.txt
index 270539cd4d..b2db09eace 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -196,6 +196,7 @@ list(APPEND fms_fortran_src_files
 # Collect FMS C source files
 list(APPEND fms_c_src_files
   affinity/affinity.c
+  fms/fms_stacksize.c
   mosaic/create_xgrid.c
   mosaic/gradient_c2l.c
   mosaic/interp.c