1 files changed, 1 insertions, 1 deletions
diff --git a/common.mk b/common.mk
index 25248342..c5531a4d 100644
--- a/common.mk
+++ b/common.mk
@@ -56,7 +56,7 @@ slides%.pdf: slides%.md $(wildcard slides.md) $(wildcard img/*) $(MAKEFILE_LIST)
 	@echo "building $@"
 	$(VERBOSE)$(PANDOC) $(SLIDES_OPTIONS) $< -o $@
 
-slides.pptx: slides.pdf $(MAKEFILE_LIST)
+slides%.pptx: slides%.pdf $(MAKEFILE_LIST)
 	@echo "building $@"
 	$(VERBOSE)$(PDF2PPTX) $<