diff --git a/mk/pp.mk b/mk/pp.mk
index 2e50fcde5fa..e9273c33b9d 100644
--- a/mk/pp.mk
+++ b/mk/pp.mk
@@ -2,7 +2,8 @@
 PP_INPUTS = $(wildcard $(addprefix $(S)src/lib/,*.rs */*.rs)) \
             $(wildcard $(addprefix $(S)src/comp/,*.rs */*.rs */*/*.rs)) \
             $(wildcard $(S)src/test/*/*.rs   \
-                       $(S)src/test/*/*/*.rs)
+                       $(S)src/test/*/*/*.rs) \
+            $(wildcard $(S)src/fuzzer/*.rs)
 
 PP_INPUTS_FILTERED = $(shell echo $(PP_INPUTS) | xargs grep -L no-reformat)