diff --git a/doc/doxygen.config b/doc/doxygen.config
index 2c16efb588d..39a9b354f31 100644
--- a/doc/doxygen.config
+++ b/doc/doxygen.config
@@ -98,8 +98,8 @@ WARN_LOGFILE           =
 # Configuration options related to the input files
 #---------------------------------------------------------------------------
 INPUT                  = \
-                        include/\
-			lib/libc/minimal/include/\
+                        include/ \
+			lib/libc/minimal/include/
 INPUT_ENCODING         = UTF-8
 FILE_PATTERNS          = "*.c" "*.h" "*.S"
 RECURSIVE              = YES