diff --git a/malariagen_data/anoph/cnv_data.py b/malariagen_data/anoph/cnv_data.py
index 2304a26d3..f7e97a3fd 100644
--- a/malariagen_data/anoph/cnv_data.py
+++ b/malariagen_data/anoph/cnv_data.py
@@ -727,7 +727,7 @@ def plot_cnv_hmm_heatmap_track(
         max_coverage_variance: cnv_params.max_coverage_variance = cnv_params.max_coverage_variance_default,
         sizing_mode: gplt_params.sizing_mode = gplt_params.sizing_mode_default,
         width: gplt_params.width = gplt_params.width_default,
-        row_height: gplt_params.row_height = gplt_params.row_height_default,
+        row_height: gplt_params.row_height = 7,
         height: Optional[gplt_params.height] = None,
         show: gplt_params.show = True,
         output_backend: gplt_params.output_backend = gplt_params.output_backend_default,
@@ -868,7 +868,7 @@ def plot_cnv_hmm_heatmap(
         max_coverage_variance: cnv_params.max_coverage_variance = cnv_params.max_coverage_variance_default,
         sizing_mode: gplt_params.sizing_mode = gplt_params.sizing_mode_default,
         width: gplt_params.width = gplt_params.width_default,
-        row_height: gplt_params.row_height = gplt_params.row_height_default,
+        row_height: gplt_params.row_height = 7,
         track_height: Optional[gplt_params.track_height] = None,
         genes_height: gplt_params.genes_height = gplt_params.genes_height_default,
         show: gplt_params.show = True,
diff --git a/malariagen_data/anoph/gplt_params.py b/malariagen_data/anoph/gplt_params.py
index 3205150fe..71ed8de2b 100644
--- a/malariagen_data/anoph/gplt_params.py
+++ b/malariagen_data/anoph/gplt_params.py
@@ -41,8 +41,6 @@
     "Plot height per row (sample) in pixels (px).",
 ]
 
-row_height_default: row_height = 7
-
 track_height: TypeAlias = Annotated[
     int,
     "Main track height in pixels (px).",