diff --git a/src/ProcessMonitor.cxx b/src/ProcessMonitor.cxx
index c28cf6ab..1918a853 100644
--- a/src/ProcessMonitor.cxx
+++ b/src/ProcessMonitor.cxx
@@ -31,10 +31,10 @@ namespace o2
 namespace monitoring
 {
 
-#ifdef O2_MONITORING_OS_CS8
-static constexpr auto SMAPS_FILE = "/proc/self/smaps_rollup";
-#else
+#ifdef O2_MONITORING_OS_CC7
 static constexpr auto SMAPS_FILE = "/proc/self/smaps";
+#else
+static constexpr auto SMAPS_FILE = "/proc/self/smaps_rollup";
 #endif
 
 ProcessMonitor::ProcessMonitor()