fix parallel build

Based on a ideas of Daniel Jacobowitz + Stefan Weil

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/rules.mak b/rules.mak
index 5d7e8bb092..4eb1f90306 100644
--- a/rules.mak
+++ b/rules.mak
@@ -13,7 +13,7 @@ MAKEFLAGS += -rR
 
 QEMU_CFLAGS += -MMD -MP -MT $@
 
-%.o: %.c
+%.o: %.c $(GENERATED_HEADERS)
 	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
 
 %.o: %.S