diff --git a/Checkpoint.cpp b/Checkpoint.cpp
index 0a64395..0f6edcf 100644
--- a/Checkpoint.cpp
+++ b/Checkpoint.cpp
@@ -202,6 +202,10 @@
 }
 
 Status cp_prepareCheckpoint() {
+    if (!isCheckpointing) {
+        return Status::ok();
+    }
+
     Fstab mounts;
     if (!ReadFstabFromFile("/proc/mounts", &mounts)) {
         return Status::fromExceptionCode(EINVAL, "Failed to get /proc/mounts");