diff --git a/awk.Makefile b/awk.Makefile
index 7ac6aa41b29e7f091a4e2b31a70920a722ec7331..268f6f6866e08f67965c186949f31964e25da50c 100644
--- a/awk.Makefile
+++ b/awk.Makefile
@@ -13,7 +13,7 @@
 # Also see <https://coq.inria.fr/bugs/show_bug.cgi?id=4907>.
 /^uninstall:/ {
 	print "uninstall:";
-	print "\tif [ -d \"$(DSTROOT)\"$(COQLIBINSTALL)/"PROJECT"/ ]; then find \"$(DSTROOT)\"$(COQLIBINSTALL)/"PROJECT"/ -name \"*.vo\" -print -delete; fi";
+	print "\tif [ -d \"$(DSTROOT)\"$(COQLIBINSTALL)/"PROJECT"/ ]; then find \"$(DSTROOT)\"$(COQLIBINSTALL)/"PROJECT"/ \\( -name \"*.vo\" -o \\( -type d -empty \\) \\) -print -delete; fi";
 	getline;
 	next
 }