diff --git a/Doxyfile b/Doxyfile
index 252e504e..76f410a0 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -763,7 +763,11 @@ INPUT_ENCODING         = UTF-8
 # *.md, *.mm, *.dox, *.py, *.f90, *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf,
 # *.qsf, *.as and *.js.
 
-FILE_PATTERNS          =
+# BEWARE! DON'T set the variable to an empty value. Don't set the variable
+# at all instead. See https://github.com/doxygen/doxygen/issues/7190 and
+# https://sigrok.org/bugzilla/show_bug.cgi?id=1422 (can get reverted when
+# the Doxygen version which causes the issue no longer is used in the wild).
+## FILE_PATTERNS          =
 
 # The RECURSIVE tag can be used to specify whether or not subdirectories should
 # be searched for input files as well.