diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9e0a937..4fd4014b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -102,6 +102,7 @@ option(BUILD_PASTRI "build the pastri code" OFF)
 option(BUILD_TIMECMPR "build the time based compression code" OFF)
 option(BUILD_RANDOMACCESS "build the random access code" OFF)
 option(BUILD_DOCKER_CONTAINERS "build docker containers for testing" OFF)
+option(BUILD_FORTRAN "build the fortran interface" OFF)
 if(BUILD_DOCKER_CONTAINERS)
   
   foreach(CONTAINER Centos Fedora Ubuntu Travis CentosPackaged)
diff --git a/sz.pc.in b/sz.pc.in
index 77ea8e31..324a8932 100644
--- a/sz.pc.in
+++ b/sz.pc.in
@@ -1,4 +1,4 @@
-includedir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@
+includedir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@/sz
 libdir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@
 
 Name: SZ
diff --git a/sz/CMakeLists.txt b/sz/CMakeLists.txt
index 248cfdf8..19ae57db 100644
--- a/sz/CMakeLists.txt
+++ b/sz/CMakeLists.txt
@@ -85,6 +85,13 @@ endif()
 if(BUILD_RANDOMACCESS)
   target_compile_definitions(SZ PUBLIC HAVE_RANDOMACCESS)
 endif()
+if(BUILD_FORTRAN)
+  enable_language(Fortran)
+  target_sources(SZ PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/rw_interface.F90
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/sz_interface.F90
+  )
+endif()
 
 install (TARGETS SZ ${thirdparty_export} EXPORT SZConfig
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}