diff --git a/.travis.yml b/.travis.yml
index 5ab6378aa..72ea08686 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -134,7 +134,7 @@ script:
 
   - cd docs
   - 'if [ "$docs" == "1" ]; then
-      make RST2HTML=rst2html.py;
+      make RST2HTML=rst2html.py AAFIGURE=echo;
     fi'
   - cd ..
 
diff --git a/docs/makefile b/docs/makefile
index 3e492eeb8..6970da2c2 100644
--- a/docs/makefile
+++ b/docs/makefile
@@ -9,6 +9,10 @@ ifndef RST2HTML
 RST2HTML:=rst2html
 endif
 
+ifndef AAFIGURE
+AAFIGURE=aafigure
+endif
+
 REFERENCE_TARGETS = \
 	manual-ref \
 	reference \
@@ -120,7 +124,7 @@ ifneq ($(STAGE),)
 endif
 
 %.png:%.diagram
-	aafigure --scale 0.6 -o $@ $?
+	$(AAFIGURE) --scale 0.6 -o $@ $?
 ifneq ($(STAGE),)
 	cp $@ $(WEB_PATH)/$@
 endif