diff --git a/doc/source/Doxyfile.in b/doc/source/Doxyfile.in
index 510ce67..ac12e1e 100644
--- a/doc/source/Doxyfile.in
+++ b/doc/source/Doxyfile.in
@@ -873,34 +873,7 @@ FILE_PATTERNS          = *.c \
                          *.hxx \
                          *.hpp \
                          *.h++ \
-                         *.cs \
-                         *.d \
-                         *.php \
-                         *.php4 \
-                         *.php5 \
-                         *.phtml \
-                         *.inc \
-                         *.m \
-                         *.markdown \
-                         *.md \
-                         *.mm \
-                         *.dox \
-                         *.doc \
-                         *.txt \
-                         *.py \
-                         *.pyw \
-                         *.f90 \
-                         *.f95 \
-                         *.f03 \
-                         *.f08 \
-                         *.f18 \
-                         *.f \
-                         *.for \
-                         *.vhd \
-                         *.vhdl \
-                         *.ucf \
-                         *.qsf \
-                         *.ice
+                         *.dox
 
 # The RECURSIVE tag can be used to specify whether or not subdirectories should
 # be searched for input files as well.