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-rw-r--r--src/zopfli/cache.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/zopfli/cache.c b/src/zopfli/cache.c
index f5559c3..6b9444f 100644
--- a/src/zopfli/cache.c
+++ b/src/zopfli/cache.c
@@ -34,7 +34,7 @@ void ZopfliInitCache(size_t blocksize, ZopfliLongestMatchCache* lmc) {
if(lmc->sublen == NULL) {
fprintf(stderr,
"Error: Out of memory. Tried allocating %lu bytes of memory.\n",
- ZOPFLI_CACHE_LENGTH * 3 * blocksize);
+ (unsigned long)ZOPFLI_CACHE_LENGTH * 3 * blocksize);
exit (EXIT_FAILURE);
}