diff --git a/doxygen/mbedtls.doxyfile b/doxygen/mbedtls.doxyfile
index 89048f221..b64c89202 100644
--- a/doxygen/mbedtls.doxyfile
+++ b/doxygen/mbedtls.doxyfile
@@ -6,7 +6,7 @@ EXTRACT_ALL            = YES
 EXTRACT_PRIVATE        = YES
 EXTRACT_STATIC         = YES
 CASE_SENSE_NAMES       = NO
-INPUT                  = ../include input
+INPUT                  = ../include input ../tests/include/alt-dummy
 FILE_PATTERNS          = *.h
 RECURSIVE              = YES
 EXCLUDE_SYMLINKS       = YES