diff --git a/CMakeLists.txt b/CMakeLists.txt
index f229c8df619..859c71c73ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -326,12 +326,8 @@ add_subdirectory(src/ConvertInputFormat)
 
 if(BUILD_FORTRAN)
   include(CMakeAddFortranSubdirectory)
-  if (UNIX)
-    # Define a top-level target `fortran_project_options`
-    # It seems that CMakeAddFortranSubdirectory] doesn't know about the target `fortran_project_option` on Windows only.
-    # On Unix it is seen and detected as multiple targets defined with the same name (CMP0002)
-    include(cmake/Fortran.cmake)
-  endif()
+  # Define a top-level target `fortran_project_options`
+  include(cmake/Fortran.cmake)
   cmake_add_fortran_subdirectory(
     src/ExpandObjects
     PROJECT ExpandObjects
diff --git a/src/AppGPostProcess/CMakeLists.txt b/src/AppGPostProcess/CMakeLists.txt
index b73311344ef..8082e09aaeb 100644
--- a/src/AppGPostProcess/CMakeLists.txt
+++ b/src/AppGPostProcess/CMakeLists.txt
@@ -16,7 +16,7 @@ set(SKIP_BUILD_RPATH TRUE)
 add_executable(AppGPostProcess ${SRC})
 set_target_properties(AppGPostProcess PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/Basement/CMakeLists.txt b/src/Basement/CMakeLists.txt
index ee37d3605e3..5955320ca70 100644
--- a/src/Basement/CMakeLists.txt
+++ b/src/Basement/CMakeLists.txt
@@ -58,7 +58,7 @@ add_executable(Basement ${SRC})
 target_compile_options(Basement PRIVATE -O1)
 set_target_properties(Basement PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/CalcSoilSurfTemp/CMakeLists.txt b/src/CalcSoilSurfTemp/CMakeLists.txt
index 89bc4f54c29..083fba6532c 100644
--- a/src/CalcSoilSurfTemp/CMakeLists.txt
+++ b/src/CalcSoilSurfTemp/CMakeLists.txt
@@ -16,7 +16,7 @@ set(SKIP_BUILD_RPATH TRUE)
 add_executable(CalcSoilSurfTemp ${SRC})
 set_target_properties(CalcSoilSurfTemp PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/ConvertESOMTR/CMakeLists.txt b/src/ConvertESOMTR/CMakeLists.txt
index 49bb8cf2394..bef67247a12 100644
--- a/src/ConvertESOMTR/CMakeLists.txt
+++ b/src/ConvertESOMTR/CMakeLists.txt
@@ -16,7 +16,7 @@ set(SKIP_BUILD_RPATH TRUE)
 add_executable(convertESOMTR ${SRC})
 set_target_properties(convertESOMTR PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/ExpandObjects/CMakeLists.txt b/src/ExpandObjects/CMakeLists.txt
index 768c6805cbf..b3045d0fe2d 100644
--- a/src/ExpandObjects/CMakeLists.txt
+++ b/src/ExpandObjects/CMakeLists.txt
@@ -22,7 +22,7 @@ set(SKIP_BUILD_RPATH TRUE)
 add_executable(ExpandObjects ${SRC})
 target_link_libraries(ExpandObjects PRIVATE fortran_project_options)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/HVAC-Diagram/CMakeLists.txt b/src/HVAC-Diagram/CMakeLists.txt
index 369fe8658c4..dc4e813b076 100644
--- a/src/HVAC-Diagram/CMakeLists.txt
+++ b/src/HVAC-Diagram/CMakeLists.txt
@@ -16,7 +16,7 @@ set(SKIP_BUILD_RPATH true)
 add_executable(HVAC-Diagram ${SRC})
 set_target_properties(HVAC-Diagram PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/ParametricPreprocessor/CMakeLists.txt b/src/ParametricPreprocessor/CMakeLists.txt
index 28369fa5157..52283ffbbba 100644
--- a/src/ParametricPreprocessor/CMakeLists.txt
+++ b/src/ParametricPreprocessor/CMakeLists.txt
@@ -16,7 +16,7 @@ set(SKIP_BUILD_RPATH true)
 add_executable(ParametricPreprocessor ${SRC})
 set_target_properties(ParametricPreprocessor PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/ReadVars/CMakeLists.txt b/src/ReadVars/CMakeLists.txt
index 068a8b01573..81be6b3973c 100644
--- a/src/ReadVars/CMakeLists.txt
+++ b/src/ReadVars/CMakeLists.txt
@@ -16,7 +16,7 @@ set(SKIP_BUILD_RPATH true)
 add_executable(ReadVarsESO ${SRC})
 set_target_properties(ReadVarsESO PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/Slab/CMakeLists.txt b/src/Slab/CMakeLists.txt
index 9fbc9fdd8b7..5d22146150a 100644
--- a/src/Slab/CMakeLists.txt
+++ b/src/Slab/CMakeLists.txt
@@ -28,7 +28,7 @@ set(SKIP_BUILD_RPATH true)
 add_executable(Slab ${SRC})
 set_target_properties(Slab PROPERTIES FOLDER Auxiliary)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)
diff --git a/src/Transition/CMakeLists.txt b/src/Transition/CMakeLists.txt
index 14d4a5e6553..df0468d78a4 100644
--- a/src/Transition/CMakeLists.txt
+++ b/src/Transition/CMakeLists.txt
@@ -29,7 +29,7 @@ add_library(TransitionLib STATIC ${LIB_SRC})
 target_include_directories(TransitionLib PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
 target_compile_options(TransitionLib PUBLIC -fbounds-check)
 
-if(NOT UNIX)  # Defined as top-level target on Unix only
+if(NOT UNIX)  # Need to reinclude it on Windows
   include("${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Fortran.cmake")
 endif()
 get_target_property(F_INTERFACE_COMPILE_FLAGS fortran_project_options INTERFACE_COMPILE_OPTIONS)