diff --git a/source/posix/system_resource_utils.c b/source/posix/system_resource_utils.c
index 1f8f5a723..053cb8eff 100644
--- a/source/posix/system_resource_utils.c
+++ b/source/posix/system_resource_utils.c
@@ -10,7 +10,7 @@
 int aws_init_memory_usage_for_current_process(struct aws_memory_usage *memory_usage) {
     AWS_PRECONDITION(memory_usage);
 
-    AWS_ZERO_STRUCT(memory_usage);
+    AWS_ZERO_STRUCT(*memory_usage);
     struct rusage usage;
 
     if (getrusage(RUSAGE_SELF, &usage)) {