diff --git a/configure.ac b/configure.ac
index 67c1bed..666a06f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -198,11 +198,13 @@ AC_COMPILE_IFELSE([
     AC_LANG_SOURCE([[char const *name = __FILE_NAME__;]])
 ], [
     AC_MSG_RESULT([yes])
-    AS_VAR_SET([no_file_name], [no])
 ], [
     AC_MSG_RESULT([no])
+    AS_IF([test . -ef "${srcdir}"], , [
+        AS_VAR_SET([no_file_name], [yes])
+    ])
 ])
-AM_CONDITIONAL([NO_FILE_NAME], [test x${no_file_name} != xno])
+AM_CONDITIONAL([NO_FILE_NAME], [test x${no_file_name} = xyes])
 
 AC_SYS_LARGEFILE
 AS_VAR_IF([ac_have_largefile], [no], [
diff --git a/src/defs.h b/src/defs.h
index cba1eb2..4decf99 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -114,7 +114,12 @@
 #ifdef __FILE_NAME__
 #  define FILE_NAME_  __FILE_NAME__
 #else
-#  define FILE_NAME_  ( __FILE__ + sizeof(BOOKMARKFS_SRCDIR) )
+#  ifdef BOOKMARKFS_SRCDIR
+#    define FILE_NAME_OFFSET_  sizeof(BOOKMARKFS_SRCDIR)
+#  else
+#    define FILE_NAME_OFFSET_  0
+#  endif
+#  define FILE_NAME_  ( __FILE__ + FILE_NAME_OFFSET_ )
 #endif
 
 #define BOOKMARKFS_HOMEPAGE_URL  "https://nongnu.org/bookmarkfs"