1 files changed, 1 insertions, 0 deletions
diff --git a/Jamrules b/Jamrules
index 7da1bce3..0dc283e5 100644
--- a/Jamrules
+++ b/Jamrules
@@ -41,6 +41,7 @@ switch $(OS)
 		NEED_STRLCPY = yes ;
 		NEED_STRLCAT = yes ;
 		NEED_STRSEP = yes ;
+		FLAG_CCALL += -std=gnu99 -DHAVE_C99 ;
 		FLAG_LDALL += -L/usr/X11R6/lib ;
 
 		switch $(CC)-$(OSPLAT)