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-rw-r--r--tools/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/Makefile b/tools/Makefile
index 6448f64c3b..953577b6d1 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -51,7 +51,7 @@ mk500boot: mk500boot.c mr500.c
$(SILENT)$(CC) $(CFLAGS) $+ -o $@
mkzenboot.o: mkzenboot.c
- $(SILENT)$(CC) $(CFLAGS) -DSTANDALONE -c -o $@ $+
+ $(SILENT)$(CC) $(CFLAGS) -std=c99 -DSTANDALONE -c -o $@ $+
mkzenboot: mkzenboot.o hmac-sha1.o
$(SILENT)$(CC) $(LDFLAGS) $+ -lz -o $@