diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index f97eb774..dd7d3d04 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -21,4 +21,7 @@ target_link_libraries(bmxtimecode PRIVATE
     bmx
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(bmxtimecode "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 install(TARGETS bmxtimecode DESTINATION bin)
diff --git a/apps/bmxparse/CMakeLists.txt b/apps/bmxparse/CMakeLists.txt
index 40d68a8e..7f52005d 100644
--- a/apps/bmxparse/CMakeLists.txt
+++ b/apps/bmxparse/CMakeLists.txt
@@ -13,4 +13,7 @@ target_link_libraries(bmxparse PRIVATE
     bmx
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(bmxparse "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 install(TARGETS bmxparse DESTINATION bin)
diff --git a/apps/bmxtranswrap/CMakeLists.txt b/apps/bmxtranswrap/CMakeLists.txt
index 586f0b50..7237c9ba 100644
--- a/apps/bmxtranswrap/CMakeLists.txt
+++ b/apps/bmxtranswrap/CMakeLists.txt
@@ -14,4 +14,7 @@ target_link_libraries(bmxtranswrap PRIVATE
     bmx_app_writers
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(bmxtranswrap "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 install(TARGETS bmxtranswrap DESTINATION bin)
diff --git a/apps/mxf2raw/CMakeLists.txt b/apps/mxf2raw/CMakeLists.txt
index 5bdbe2b3..a04e5654 100644
--- a/apps/mxf2raw/CMakeLists.txt
+++ b/apps/mxf2raw/CMakeLists.txt
@@ -18,4 +18,7 @@ target_link_libraries(mxf2raw PRIVATE
     bmx
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(mxf2raw "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 install(TARGETS mxf2raw DESTINATION bin)
diff --git a/apps/raw2bmx/CMakeLists.txt b/apps/raw2bmx/CMakeLists.txt
index a9aa4023..c6c63dcf 100644
--- a/apps/raw2bmx/CMakeLists.txt
+++ b/apps/raw2bmx/CMakeLists.txt
@@ -14,4 +14,7 @@ target_link_libraries(raw2bmx PRIVATE
     bmx_app_writers
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(raw2bmx "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 install(TARGETS raw2bmx DESTINATION bin)
diff --git a/apps/writers/CMakeLists.txt b/apps/writers/CMakeLists.txt
index 84648cc8..f7f1c782 100644
--- a/apps/writers/CMakeLists.txt
+++ b/apps/writers/CMakeLists.txt
@@ -14,3 +14,6 @@ target_compile_definitions(bmx_app_writers PRIVATE
 target_link_libraries(bmx_app_writers PUBLIC
     bmx
 )
+
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(bmx_app_writers "${CMAKE_CURRENT_LIST_DIR}" "bmx")
diff --git a/cmake/source_filename.cmake b/cmake/source_filename.cmake
new file mode 100644
index 00000000..7878ae44
--- /dev/null
+++ b/cmake/source_filename.cmake
@@ -0,0 +1,12 @@
+# Adds the __FILENAME__=filename compile definition.
+# Based on https://stackoverflow.com/a/27990434, but changed to define __FILENAME__ to be a relative project path
+function(set_source_filename target sources_base_dir project_dirname)
+    get_target_property(source_files "${target}" SOURCES)
+    foreach(source_file ${source_files})
+        file(RELATIVE_PATH rel_path ${PROJECT_SOURCE_DIR} "${sources_base_dir}/${source_file}")
+        file(TO_NATIVE_PATH "${project_dirname}/${rel_path}" filename)
+        set_property(
+            SOURCE "${source_file}" APPEND
+            PROPERTY COMPILE_DEFINITIONS "__FILENAME__=\"${filename}\"")
+    endforeach()
+endfunction()
diff --git a/include/bmx/BMXException.h b/include/bmx/BMXException.h
index 568d712b..e6ec14e0 100644
--- a/include/bmx/BMXException.h
+++ b/include/bmx/BMXException.h
@@ -38,11 +38,11 @@
 #include <exception>
 
 
-#define BMX_EXCEPTION(err)                                          \
-    do {                                                            \
-        bmx::log_error_nl err;                                      \
-        bmx::log_error("    near %s:%d\n", __FILE__, __LINE__);     \
-        throw BMXException err;                                     \
+#define BMX_EXCEPTION(err)                                           \
+    do {                                                             \
+        bmx::log_error_nl err;                                       \
+        bmx::log_error("    near %s:%d\n", __FILENAME__, __LINE__);  \
+        throw BMXException err;                                      \
     } while (0)
 
 #define BMX_CHECK(cond)                                     \
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 45ab6c0f..d5c9306e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -86,6 +86,9 @@ set_target_properties(bmx PROPERTIES
     SOVERSION ${PROJECT_VERSION_MAJOR}
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(bmx "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 install(TARGETS bmx
     ARCHIVE DESTINATION lib
     LIBRARY DESTINATION lib
diff --git a/src/mxf_reader/MXFFileReader.cpp b/src/mxf_reader/MXFFileReader.cpp
index 99a4eb33..e34479dd 100644
--- a/src/mxf_reader/MXFFileReader.cpp
+++ b/src/mxf_reader/MXFFileReader.cpp
@@ -100,7 +100,7 @@ static const char *RESULT_STRINGS[] =
 
 #define THROW_RESULT(result)                                                        \
     do {                                                                            \
-        log_warn("Open error '%s' near %s:%d\n", #result, __FILE__, __LINE__);      \
+        log_warn("Open error '%s' near %s:%d\n", #result, __FILENAME__, __LINE__);  \
         throw result;                                                               \
     } while (0)
 
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 93eca507..bb7b5ea4 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -2,10 +2,15 @@ add_executable(create_test_essence
     create_test_essence.cpp
 )
 
+include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+set_source_filename(create_test_essence "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 add_executable(file_truncate
     file_truncate.cpp
 )
 
+set_source_filename(file_truncate "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
 add_subdirectory(ard_zdf_hdf)
 add_subdirectory(as02)
 add_subdirectory(as10)
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 95b19b5c..fd65a5fe 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -12,5 +12,9 @@ foreach(tool_source ${tool_sources})
     add_executable(${tool_target}
         ${tool_source}
     )
+
+    include("${PROJECT_SOURCE_DIR}/cmake/source_filename.cmake")
+    set_source_filename(${tool_target} "${CMAKE_CURRENT_LIST_DIR}" "bmx")
+
     install(TARGETS ${tool_target} DESTINATION bin)
 endforeach()