diff --git a/rtengine/ipwavelet.cc b/rtengine/ipwavelet.cc
index 629dfcb66..5d899617b 100644
--- a/rtengine/ipwavelet.cc
+++ b/rtengine/ipwavelet.cc
@@ -537,7 +537,7 @@ SSEFUNCTION void ImProcFunctions::ip_wavelet(LabImage * lab, LabImage * dst, int
     // begin tile processing of image
 
     //output buffer
-    int realtile;
+    int realtile = 0;
 
     if(params->wavelet.Tilesmethod == "big") {
         realtile = 22;