diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index 613fa1b9..f0622c23 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -826,7 +826,7 @@ WARN_NO_PARAMDOC       = NO
 # Possible values are: NO, YES and FAIL_ON_WARNINGS.
 # The default value is: NO.
 
-WARN_AS_ERROR          = NO
+WARN_AS_ERROR          = YES
 
 # The WARN_FORMAT tag determines the format of the warning messages that doxygen
 # can produce. The string should contain the $file, $line, and $text tags, which