diff --git a/src/Migrate/Migrator.php b/src/Migrate/Migrator.php
index 80a679c..611e79e 100644
--- a/src/Migrate/Migrator.php
+++ b/src/Migrate/Migrator.php
@@ -184,7 +184,7 @@ public function markVersion($version)
 
         if ($status->isApplied()) {
             $this->logger->log("version already migrated: $version");
-        } elseif ($status->hasContent() == false) {
+        } elseif ($status->isMissing()) {
             $this->logger->log("mark version: $version is missing");
         } else {
             $this->adapter->save($version, $status->getContent());
@@ -199,8 +199,8 @@ public function markAllVersions()
         foreach ($statuses as $version => $status) {
             if ($status->isApplied()) {
                 // skip
-            } elseif ($status->hasContent() == false) {
-                $this->logger->log("mark version: $version is missing");
+            } elseif ($status->isMissing()) {
+                // skip
             } else {
                 $this->adapter->save($version, $status->getContent());
                 $this->logger->log("mark version: $version");
diff --git a/src/Migrate/Status.php b/src/Migrate/Status.php
index 785c305..335a2bd 100644
--- a/src/Migrate/Status.php
+++ b/src/Migrate/Status.php
@@ -1,6 +1,8 @@
 <?php
 namespace ngyuki\DbMigrate\Migrate;
 
+use Guzzle\Common\Exception\RuntimeException;
+
 class Status
 {
     /**
@@ -61,10 +63,14 @@ public function getContent()
     {
         if ($this->source === null) {
             if ($this->script !== null) {
-                $this->source = file_get_contents($this->script);
+                $source = file_get_contents($this->script);
+                if ($source === false) {
+                    throw new RuntimeException("Unable read \"$this->script\"");
+                }
+                $this->source = $source;
             };
         }
-        if ($this->source !== false && $this->source !== null) {
+        if ($this->source !== null) {
             return $this->source;
         } else {
             return $this->content;