diff --git a/doc/Makefile.am b/doc/Makefile.am
index 6a8a0746f842c5c99bea89b5de35037571a4182e..4fc614fe84bd56e36853b58f20a3693e32ee80ab 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -4,7 +4,7 @@ all: doxygen-tag
 
 doxygen-tag: Doxyfile
 @AMDEP_TRUE@	./Doxydep $< $(DEPDIR)/doxygen.Po $@
-	doxygen >& doxygen.log
+	doxygen > doxygen.log 2>&1
 	touch doxygen-tag
 
 WEBDIR = /var/www/dune/doxygen