diff --git a/syscall/Makefile b/syscall/Makefile
index 7965907a6f..47efbae007 100644
--- a/syscall/Makefile
+++ b/syscall/Makefile
@@ -44,7 +44,7 @@ PROXY_OBJS = $(PROXY_SRCS:.c=$(OBJEXT))
 STUB_OBJS = $(STUB_SRCS:.c=$(OBJEXT))
 WRAP_OBJS = $(WRAP_SRCS:.c=$(OBJEXT))
 
-CSRCS = $(PROXY_SRCS) $(STUB_SRCS) $(WRAP_SRCS)
+CSRCS = $(sort $(PROXY_SRCS) $(STUB_SRCS) $(WRAP_SRCS))
 COBJS = $(CSRCS:.c=$(OBJEXT))
 
 SRCS = $(ASRCS) $(CSRCS)