diff --git a/radeon/radeon_surface.c b/radeon/radeon_surface.c
index d1fdc4bf..a74064c4 100644
--- a/radeon/radeon_surface.c
+++ b/radeon/radeon_surface.c
@@ -159,7 +159,8 @@ static void surf_minify(struct radeon_surface *surf,
     surflevel->nblk_x = (surflevel->npix_x + surf->blk_w - 1) / surf->blk_w;
     surflevel->nblk_y = (surflevel->npix_y + surf->blk_h - 1) / surf->blk_h;
     surflevel->nblk_z = (surflevel->npix_z + surf->blk_d - 1) / surf->blk_d;
-    if (surf->nsamples == 1 && surflevel->mode == RADEON_SURF_MODE_2D) {
+    if (surf->nsamples == 1 && surflevel->mode == RADEON_SURF_MODE_2D &&
+        !(surf->flags & RADEON_SURF_FMASK)) {
         if (surflevel->nblk_x < xalign || surflevel->nblk_y < yalign) {
             surflevel->mode = RADEON_SURF_MODE_1D;
             return;
@@ -565,7 +566,8 @@ static void eg_surf_minify(struct radeon_surface *surf,
     surflevel->nblk_x = (surflevel->npix_x + surf->blk_w - 1) / surf->blk_w;
     surflevel->nblk_y = (surflevel->npix_y + surf->blk_h - 1) / surf->blk_h;
     surflevel->nblk_z = (surflevel->npix_z + surf->blk_d - 1) / surf->blk_d;
-    if (surf->nsamples == 1 && surflevel->mode == RADEON_SURF_MODE_2D) {
+    if (surf->nsamples == 1 && surflevel->mode == RADEON_SURF_MODE_2D &&
+        !(surf->flags & RADEON_SURF_FMASK)) {
         if (surflevel->nblk_x < mtilew || surflevel->nblk_y < mtileh) {
             surflevel->mode = RADEON_SURF_MODE_1D;
             return;
@@ -1459,7 +1461,8 @@ static void si_surf_minify_2d(struct radeon_surface *surf,
         surflevel->nblk_z = (surflevel->npix_z + surf->blk_d - 1) / surf->blk_d;
     }
 
-    if (surf->nsamples == 1 && surflevel->mode == RADEON_SURF_MODE_2D) {
+    if (surf->nsamples == 1 && surflevel->mode == RADEON_SURF_MODE_2D &&
+        !(surf->flags & RADEON_SURF_FMASK)) {
         if (surflevel->nblk_x < xalign || surflevel->nblk_y < yalign) {
             surflevel->mode = RADEON_SURF_MODE_1D;
             return;
diff --git a/radeon/radeon_surface.h b/radeon/radeon_surface.h
index 2babfd71..bbed56f8 100644
--- a/radeon/radeon_surface.h
+++ b/radeon/radeon_surface.h
@@ -56,6 +56,7 @@
 #define RADEON_SURF_SBUFFER                     (1 << 18)
 #define RADEON_SURF_HAS_SBUFFER_MIPTREE         (1 << 19)
 #define RADEON_SURF_HAS_TILE_MODE_INDEX         (1 << 20)
+#define RADEON_SURF_FMASK                       (1 << 21)
 
 #define RADEON_SURF_GET(v, field)   (((v) >> RADEON_SURF_ ## field ## _SHIFT) & RADEON_SURF_ ## field ## _MASK)
 #define RADEON_SURF_SET(v, field)   (((v) & RADEON_SURF_ ## field ## _MASK) << RADEON_SURF_ ## field ## _SHIFT)