diff --git a/opengl/libagl/texture.cpp b/opengl/libagl/texture.cpp
index 73b1db4..a1a776f 100644
--- a/opengl/libagl/texture.cpp
+++ b/opengl/libagl/texture.cpp
@@ -1152,7 +1152,7 @@
         if (etc1_decode_image(
                 (const etc1_byte*)data,
                 (etc1_byte*)surface->data,
-                width, height, 3, surface->stride) != 0) {
+                width, height, 3, surface->stride*3) != 0) {
             ogles_error(c, GL_INVALID_OPERATION);
         }
         return;