diff --git a/api/tests/integration/tests/rendering/acs_style.py b/api/tests/integration/tests/rendering/acs_style.py
index 656e04e0c3..51dbbf4d4a 100644
--- a/api/tests/integration/tests/rendering/acs_style.py
+++ b/api/tests/integration/tests/rendering/acs_style.py
@@ -67,6 +67,7 @@
 indigo.setOption("render-hash-spacing", "10")
 indigo.setOption("render-stereo-bond-width", "30")
 indigo.setOption("render-font-size", "20")
+indigo.setOption("render-font-size-sub", "30")
 renderer.renderToFile(mol, joinPathPy("out/acs_style_changed.png", __file__))
 print(checkImageSimilarity("acs_style_changed.png"))
 
@@ -89,6 +90,7 @@
 renderer.renderToFile(mol, joinPathPy("out/" + pngname, __file__))
 print(checkImageSimilarity(pngname))
 
+
 if isIronPython():
     renderer.Dispose()
     indigo.Dispose()
diff --git a/api/tests/integration/tests/rendering/ref/linux/acs_style_changed.png b/api/tests/integration/tests/rendering/ref/linux/acs_style_changed.png
index 2c1b7402c4..3ac7de111a 100644
Binary files a/api/tests/integration/tests/rendering/ref/linux/acs_style_changed.png and b/api/tests/integration/tests/rendering/ref/linux/acs_style_changed.png differ
diff --git a/api/tests/integration/tests/rendering/ref/mac/acs_style_changed.png b/api/tests/integration/tests/rendering/ref/mac/acs_style_changed.png
index 2c1b7402c4..3ac7de111a 100644
Binary files a/api/tests/integration/tests/rendering/ref/mac/acs_style_changed.png and b/api/tests/integration/tests/rendering/ref/mac/acs_style_changed.png differ
diff --git a/api/tests/integration/tests/rendering/ref/win/acs_style_changed.png b/api/tests/integration/tests/rendering/ref/win/acs_style_changed.png
index 2c1b7402c4..3ac7de111a 100644
Binary files a/api/tests/integration/tests/rendering/ref/win/acs_style_changed.png and b/api/tests/integration/tests/rendering/ref/win/acs_style_changed.png differ
diff --git a/core/render2d/src/render_common.cpp b/core/render2d/src/render_common.cpp
index e2b315b91c..62a7a182a7 100644
--- a/core/render2d/src/render_common.cpp
+++ b/core/render2d/src/render_common.cpp
@@ -315,7 +315,7 @@ void RenderSettings::init(float relativeThickness, float bondLineWidthFactor, Ac
     static constexpr float TWO_DIV_THREE = 2.0f / 3.0f;
     fzz[FONT_SIZE_LABEL] = label_font_size;
     if (acs != nullptr && acs->fontSizeSubAngstrom > 0)
-        fzz[FONT_SIZE_ATTR] = acs->fontSizeAngstrom;
+        fzz[FONT_SIZE_ATTR] = acs->fontSizeSubAngstrom;
     else
         fzz[FONT_SIZE_ATTR] = label_font_size * TWO_DIV_THREE; // unit * 8; // Subscript
     fzz[FONT_SIZE_RGROUP_LOGIC] = label_font_size;