diff --git a/doc/Makefile b/doc/Makefile
index 5f066fffc..939e0963e 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -23,22 +23,23 @@ endif
 
 .PHONY: clean html pdf upload
 
-html: init doxygen
+html: init doxygen.log
 
 pdf: doclatex = YES
-pdf: init doxygen
+pdf: init doxygen.log
 	gmake -C latex refman.pdf
 
 init:
 	@echo "> Scanning files"
 
 # This target requires and graphviz and doxygen
-doxygen: docdirs = $(foreach dir,$(basedirs),${shell find ../${dir} -type d -not -path "*/.*" -not -path "*/obj_*"})
-doxygen: docsrc = $(docdirs) $(foreach dir,$(docdirs),${shell find $(dir) -type f $(filetypes)}) $(manuals)
-doxygen:
+doxygen.log: docdirs = $(foreach dir,$(basedirs),${shell find ../${dir} -type d -not -path "*/.*" -not -path "*/obj_*"})
+doxygen.log: docsrc = $(docdirs) $(foreach dir,$(docdirs),${shell find $(dir) -type f $(filetypes)}) $(manuals)
+doxygen.log:
 	@doxygen Doxyfile
 	@echo "Done, errorlog follows:"
 	@echo ""
+	@touch doxygen.log
 	@cat "doxygen.log"
 
 clean: