diff --git a/packages/cogify/src/cogify/gdal.command.ts b/packages/cogify/src/cogify/gdal.command.ts
index d41c66eee..e3cf35d33 100644
--- a/packages/cogify/src/cogify/gdal.command.ts
+++ b/packages/cogify/src/cogify/gdal.command.ts
@@ -20,7 +20,7 @@ function getTargetOptions(opt: CogifyCreationOptions): TargetOptions {
   if (opt.tileMatrix) {
     const tileMatrix = TileMatrixSets.find(opt.tileMatrix);
     if (tileMatrix == null) throw new Error('Unable to find tileMatrix: ' + opt.tileMatrix);
-    targetOpts.targetSrs = tileMatrix.projection.toEpsgString();
+    if (opt.noReprojecting == null) targetOpts.targetSrs = tileMatrix.projection.toEpsgString();
 
     if (opt.tile) {
       const bounds = tileMatrix.tileToSourceBounds(opt.tile);
diff --git a/packages/cogify/src/cogify/stac.ts b/packages/cogify/src/cogify/stac.ts
index 752894f04..2dfe7e917 100644
--- a/packages/cogify/src/cogify/stac.ts
+++ b/packages/cogify/src/cogify/stac.ts
@@ -15,7 +15,7 @@ export interface CogifyCreationOptions {
   tile?: Tile;
 
   /** Tile matrix to create the tiles against */
-  tileMatrix?: string;
+  tileMatrix: string;
 
   /** Projection of source imagery */
   sourceEpsg: number;