diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9bb73a9feb..c794c1a5cf 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -254,7 +254,7 @@ set (H5FD_HDRS
     ${HDF5_SRC_DIR}/H5FDmulti.h
     ${HDF5_SRC_DIR}/H5FDpublic.h
     ${HDF5_SRC_DIR}/H5FDros3.h
-    ${HDF5_SRC_DIR}/H5FDs3comms.c
+    ${HDF5_SRC_DIR}/H5FDs3comms.h
     ${HDF5_SRC_DIR}/H5FDsec2.h
     ${HDF5_SRC_DIR}/H5FDstdio.h
     ${HDF5_SRC_DIR}/H5FDwindows.h