--- a/src/util.cc
+++ b/src/util.cc
@@ -47,7 +47,7 @@
 #include <sys/loadavg.h>
 #elif defined(_AIX) && !defined(__PASE__)
 #include <libperfstat.h>
-#elif defined(linux) || defined(__GLIBC__)
+#elif defined(__linux__) || defined(__GLIBC__)
 #include <sys/sysinfo.h>
 #include <fstream>
 #include <map>
@@ -589,7 +589,7 @@
   return stripped;
 }
 
-#if defined(linux) || defined(__GLIBC__)
+#if defined(__linux__) || defined(__GLIBC__)
 std::pair<int64_t, bool> readCount(const std::string& path) {
   std::ifstream file(path.c_str());
   if (!file.is_open())
@@ -789,7 +789,7 @@
 #else
   int cgroupCount = -1;
   int schedCount = -1;
-#if defined(linux) || defined(__GLIBC__)
+#if defined(__linux__) || defined(__GLIBC__)
   cgroupCount = ParseCPUFromCGroup();
 #endif
   // The number of exposed processors might not represent the actual number of