diff --git a/ext/json/generator/depend b/ext/json/generator/depend
index d9160673a2..fb3b038365 100644
--- a/ext/json/generator/depend
+++ b/ext/json/generator/depend
@@ -180,4 +180,5 @@ generator.o: $(srcdir)/../fbuffer/fbuffer.h
 generator.o: $(srcdir)/../vendor/fpconv.c
 generator.o: $(srcdir)/../vendor/jeaiii-ltoa.h
 generator.o: generator.c
+generator.o: simd.h
 # AUTOGENERATED DEPENDENCIES END