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-rw-r--r--libdislocator/libdislocator.so.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libdislocator/libdislocator.so.c b/libdislocator/libdislocator.so.c
index 72d280e6..19e84d9f 100644
--- a/libdislocator/libdislocator.so.c
+++ b/libdislocator/libdislocator.so.c
@@ -466,7 +466,7 @@ void *reallocarray(void *ptr, size_t elem_len, size_t elem_cnt) {
 
 size_t malloc_usable_size(void *ptr) {
 
-   return PTR_L(ptr);
+   return ptr ? PTR_L(ptr) : 0;
 
 }