diff --git a/include/simdjson/rvv/implementation.h b/include/simdjson/rvv/implementation.h
index 3a3f2bea0..bdc1662c6 100644
--- a/include/simdjson/rvv/implementation.h
+++ b/include/simdjson/rvv/implementation.h
@@ -2,6 +2,7 @@
 #define SIMDJSON_RVV_IMPLEMENTATION_H
 
 #ifndef SIMDJSON_CONDITIONAL_INCLUDE
+#define SIMDJSON_CONDITIONAL_INCLUDE
 #include "simdjson/base.h"
 #include "simdjson/implementation.h"
 #include "simdjson/internal/instruction_set.h"