diff --git a/src/rx/rx_kcommon.c b/src/rx/rx_kcommon.c
index d2bf5e0088..688c31ca11 100644
--- a/src/rx/rx_kcommon.c
+++ b/src/rx/rx_kcommon.c
@@ -1344,7 +1344,7 @@ osi_Panic(char *msg, ...)
     va_start(ap, msg);
     vsnprintf(buf, sizeof(buf), msg, ap);
     va_end(ap);
-    printf(buf);
+    printf("%s", buf);
     panic(buf);
 #else
     va_list ap;
diff --git a/src/rx/rx_kernel.h b/src/rx/rx_kernel.h
index b6ac7f4cf0..a7a0e94037 100644
--- a/src/rx/rx_kernel.h
+++ b/src/rx/rx_kernel.h
@@ -36,7 +36,7 @@ typedef struct socket *osi_socket;
         CM_TRACE_RXWAKE, ICL_TYPE_STRING, __FILE__, ICL_TYPE_INT32, __LINE__)
 
 extern int osi_utoa(char *buf, size_t len, unsigned long val);
-#define osi_Assert(e) (void)((e) || (osi_AssertFailK(#e, __FILE__, __LINE__), 0))
+#define osi_Assert(exp) (void)((exp) || (osi_AssertFailK( #exp , __FILE__, __LINE__), 0))
 
 #define	osi_Msg printf)(
 #define osi_VMsg vprintf)(