diff --git a/Makefile b/Makefile
index d7af899..3599212 100644
--- a/Makefile
+++ b/Makefile
@@ -16,8 +16,8 @@ $(BUILDDIR)/pegrep-debug: $(LIBS)
 		--load ./src/pegrep.asd \
 		--eval '(ql:quickload :alexandria)' \
 		--eval '(asdf:disable-output-translations)' \
-		--eval '(asdf:load-system :pegrep-debug)' \
-		--eval '(asdf:make :pegrep-debug)' \
+		--eval '(asdf:load-system :pegrep/debug)' \
+		--eval '(asdf:make :pegrep/debug)' \
 		--eval '(quit)'
 
 $(BUILDDIR)/pegrep: $(LIBS)
diff --git a/src/pegrep.asd b/src/pegrep.asd
index c1f6244..eb02646 100644
--- a/src/pegrep.asd
+++ b/src/pegrep.asd
@@ -18,7 +18,7 @@
                                 (speed 3)))
                     (funcall next)))
 
-(def-pegrep :pegrep-debug
+(def-pegrep :pegrep/debug
   :build-pathname "../build/pegrep-debug"
   :around-compile (lambda (next)
                     (proclaim '(optimize