diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index a641dbb..8258c45 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -180,7 +180,7 @@
             continue;
         }
 
-        if (limit_by_mtime && st.st_mtime >= thirty_minutes_ago) {
+        if (limit_by_mtime && st.st_mtime < thirty_minutes_ago) {
             MYLOGI("Excluding stale dump file: %s\n", abs_path.c_str());
             continue;
         }