diff --git a/Makefile.fuzz b/Makefile.fuzz
index 46358246b..2a97d67f0 100644
--- a/Makefile.fuzz
+++ b/Makefile.fuzz
@@ -25,7 +25,7 @@ echo:
 
 .PHONY: $(PLUGINS)
 $(PLUGINS): echo
-	go-fuzz-build $(REPO)/$(@)
+	go-fuzz-build -tags fuzz $(REPO)/$(@)
 	go-fuzz -bin=./$(@)-fuzz.zip -workdir=fuzz/$(@)
 
 .PHONY: clean
diff --git a/plugin/cache/fuzz.go b/plugin/cache/fuzz.go
index f989019a7..c2ca7554e 100644
--- a/plugin/cache/fuzz.go
+++ b/plugin/cache/fuzz.go
@@ -1,3 +1,5 @@
+// +build fuzz
+
 package cache
 
 import (
diff --git a/plugin/file/fuzz.go b/plugin/file/fuzz.go
index 6be92fb70..84f5c1853 100644
--- a/plugin/file/fuzz.go
+++ b/plugin/file/fuzz.go
@@ -1,3 +1,5 @@
+// +build fuzz
+
 package file
 
 import (
diff --git a/plugin/proxy/fuzz.go b/plugin/proxy/fuzz.go
index f13ed75bc..bb8e07f8a 100644
--- a/plugin/proxy/fuzz.go
+++ b/plugin/proxy/fuzz.go
@@ -1,3 +1,5 @@
+// +build fuzz
+
 package proxy
 
 import (
diff --git a/plugin/rewrite/fuzz.go b/plugin/rewrite/fuzz.go
index c268964e3..6de5f12ca 100644
--- a/plugin/rewrite/fuzz.go
+++ b/plugin/rewrite/fuzz.go
@@ -1,3 +1,5 @@
+// +build fuzz
+
 package rewrite
 
 import (