diff --git a/src/commands.c b/src/commands.c
index 33743848..387c7cfa 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -694,13 +694,15 @@ void cmd_resize_set(I3_CMD, long cwidth, const char *mode_width, long cheight, c
                 continue;
             }
 
-            if (cwidth > 0 && mode_width) {
+            if (cwidth > 0) {
+                bool is_ppt = mode_width && strcmp(mode_width, "ppt") == 0;
                 success &= resize_set_tiling(current_match, cmd_output, current->con,
-                                             HORIZ, strcmp(mode_width, "ppt") == 0, cwidth);
+                                             HORIZ, is_ppt, cwidth);
             }
-            if (cheight > 0 && mode_height) {
+            if (cheight > 0) {
+                bool is_ppt = mode_height && strcmp(mode_height, "ppt") == 0;
                 success &= resize_set_tiling(current_match, cmd_output, current->con,
-                                             VERT, strcmp(mode_height, "ppt") == 0, cheight);
+                                             VERT, is_ppt, cheight);
             }
         }
     }
diff --git a/testcases/t/541-resize-set-tiling.t b/testcases/t/541-resize-set-tiling.t
index d695edee..0298fecd 100644
--- a/testcases/t/541-resize-set-tiling.t
+++ b/testcases/t/541-resize-set-tiling.t
@@ -124,6 +124,14 @@ cmd 'resize set 155 px 135 px';
 cmp_float($nodes->[1]->{nodes}->[1]->{rect}->{width}, 155, 'bottom-right window got 155 px width');
 cmp_float($nodes->[1]->{nodes}->[1]->{rect}->{height}, 135, 'bottom-right window got 135 px height');
 
+# Without specifying mode
+cmd 'resize set 201 131';
+
+($nodes, $focus) = get_ws_content($tmp);
+
+cmp_float($nodes->[1]->{nodes}->[1]->{rect}->{width}, 201, 'bottom-right window got 201 px width');
+cmp_float($nodes->[1]->{nodes}->[1]->{rect}->{height}, 131, 'bottom-right window got 131 px height');
+
 # Mix ppt and px
 cmd 'resize set 75 ppt 200 px';