1 files changed, 2 insertions, 2 deletions

diff --git a/include/stdio.h b/include/stdio.h
index 97ae185..b1ccc75 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -49,7 +49,7 @@ __fortify_vsprintf(char *s, const char *fmt, __builtin_va_list ap)
         size_t bos = __builtin_object_size(s, 0);
         int r;
 
-        if (bos != -1) {
+        if (bos != (size_t)-1) {
                 r = vsnprintf(s, bos, fmt, ap);
                 if (r != -1 && (size_t)r >= bos)
                         __builtin_trap();
@@ -94,7 +94,7 @@ __fortify_vsnprintf(char *s, size_t n, const char *fmt, __builtin_va_list ap)
 #define sprintf(s, fmt, ...) ({ \
         size_t bos = __builtin_object_size(s, 0); \
         int r; \
-        if (bos != -1) { \
+        if (bos != (size_t)-1) { \
                 r = (snprintf)(s, bos, fmt, ## __VA_ARGS__); \
                 if (r != -1 && (size_t)r >= bos) \
                         __builtin_trap(); \