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-rw-r--r--src/lib/openjp2/opj_malloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/openjp2/opj_malloc.c b/src/lib/openjp2/opj_malloc.c
index 04ef055c..a4aea30f 100644
--- a/src/lib/openjp2/opj_malloc.c
+++ b/src/lib/openjp2/opj_malloc.c
@@ -166,7 +166,7 @@ static INLINE void *opj_aligned_realloc_n(void *ptr, size_t alignment, size_t ne
size_t new_offset;
/* realloc created a new copy, realign the copied memory block */
- old_offset = (size_t)(ptr - oldmem);
+ old_offset = (size_t)((OPJ_UINT8*)ptr - (OPJ_UINT8*)oldmem);
/* offset = ((alignment + 1U) - ((size_t)(mem + sizeof(void*)) & alignment)) & alignment; */
/* Use the fact that alignment + 1U is a power of 2 */