diff --git a/libmeminfo/src/meminfo.cpp b/libmeminfo/src/meminfo.cpp
index 6f85c9728bfd1cf5f2bc5b4bba4f6e6fcfee79d3..ee424d3ce5f4132b30d7c8e95dbc93528a78c81d 100644
--- a/libmeminfo/src/meminfo.cpp
+++ b/libmeminfo/src/meminfo.cpp
@@ -64,7 +64,7 @@ uint64_t GetRssByPid(const int pid)
     std::istringstream isStatm(statm);
     isStatm >> vss >> rss; // pages
 
-    size = static_cast<int>(atoi(rss.c_str())) * PAGE_TO_KB;
+    size = static_cast<uint64_t>(atoi(rss.c_str()) * PAGE_TO_KB);
     return size;
 }