diff --git a/source/posix/system_resource_utils.c b/source/posix/system_resource_utils.c
index 2b928405a..4084d8720 100644
--- a/source/posix/system_resource_utils.c
+++ b/source/posix/system_resource_utils.c
@@ -26,6 +26,6 @@ int aws_memory_usage_for_current_process(struct aws_memory_usage *mu) {
 #else
     mu->maxrss = usage.ru_maxrss;
 #endif
-    ru->page_faults = usage.ru_majflt;
+    mu->page_faults = usage.ru_majflt;
     return AWS_OP_SUCCESS;
 }