diff --git a/Makefile b/Makefile
index fd090dc9..f79a6eee 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ else
 ifdef SANITIZE
 ifeq ($(SANITIZE),1)
   override SANITIZE := -fsanitize=address,undefined,leak
-else
+else ifeq ($(filter -fsanitize=%,$(SANITIZE)),)
   override SANITIZE := -fsanitize=$(SANITIZE)
 endif
 endif
diff --git a/vendored/libfuse/Makefile b/vendored/libfuse/Makefile
index f0bbfc5d..d521f5db 100644
--- a/vendored/libfuse/Makefile
+++ b/vendored/libfuse/Makefile
@@ -38,7 +38,7 @@ else
 ifdef SANITIZE
 ifeq ($(SANITIZE),1)
   override SANITIZE := -fsanitize=address,undefined,leak
-else
+else ifeq ($(filter -fsanitize=%,$(SANITIZE)),)
   override SANITIZE := -fsanitize=$(SANITIZE)
 endif
 endif