diff --git a/ImageManager.cpp b/ImageManager.cpp
index ebdacee..8d57a96 100644
--- a/ImageManager.cpp
+++ b/ImageManager.cpp
@@ -80,7 +80,7 @@ void ImageManager::ProcessImage(int width, int height, uint8_t *imgPointer)
             drawContours(viewfinder, contours, i, Scalar(ZERO, BITS8, ZERO), 2);
 
             std::vector<uchar> imageBuffer;
-            imencode("pgm", frame, imageBuffer);
+            imencode(".pgm", frame, imageBuffer);
             QByteArray* imageBytes = new QByteArray(reinterpret_cast<const char*>(imageBuffer.data()), imageBuffer.size());
 
             ((FaultFinder*)(parent()))->fault_mgr->SaveImage(imageBytes);