diff --git a/Makefile.target b/Makefile.target
index 310de1e72d2fd005c73f21e27f21e691d36dee62..ea953e0d2c74616d0561a8adbfd90e16ce049067 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -186,6 +186,7 @@ all: $(PROGS)
 LIBOBJS=exec.o kqemu.o translate-all.o cpu-exec.o\
         translate.o host-utils.o
 ifdef CONFIG_DYNGEN_OP
+exec.o: dyngen-opc.h
 LIBOBJS+=op.o
 endif
 # TCG code generator