diff --git a/Makefile b/Makefile
index 5616d30cd..29ca96681 100644
--- a/Makefile
+++ b/Makefile
@@ -71,7 +71,7 @@ material%/.:
 # -----------------------------------------------------------------------------
 
 # Web font specimen
-FONTS_SPECIMEN = $(subst src,material,$(wildcard src/assets/fonts/specimen/*))
+FONTS_SPECIMEN = $(subst src,material,$(wildcard src/assets/fonts/specimen/*.*))
 material/assets/fonts/specimen: ${FONTS_SPECIMEN}
 material/assets/fonts/specimen/%: src/assets/fonts/specimen/% | $$(@D)/.
 	@ echo "+ $@"