diff --git a/rtengine/ipwavelet.cc b/rtengine/ipwavelet.cc
index f415c9c8e..39de7c938 100644
--- a/rtengine/ipwavelet.cc
+++ b/rtengine/ipwavelet.cc
@@ -866,7 +866,7 @@ void ImProcFunctions::ip_wavelet(LabImage * lab, LabImage * dst, int kall, const
 
                 if (levwavL > 0) {
                     const std::unique_ptr<wavelet_decomposition> Ldecomp(new wavelet_decomposition(labco->data, labco->W, labco->H, levwavL, 1, skip, rtengine::max(1, wavNestedLevels), DaubLen));
-                    float madL[8][3];
+                    float madL[10][3];
 
                     if (!Ldecomp->memoryAllocationFailed) {