diff --git a/packages/optimizer/lib/transformers/ApplyCommonAttributes.js b/packages/optimizer/lib/transformers/ApplyCommonAttributes.js
index 694ff7c41..86a7baf55 100644
--- a/packages/optimizer/lib/transformers/ApplyCommonAttributes.js
+++ b/packages/optimizer/lib/transformers/ApplyCommonAttributes.js
@@ -256,6 +256,8 @@ class ApplyCommonAttributes {
'amp-custom': '',
});
appendChild(head, customStyles);
+ }
+ if (customStyles.children.length === 0) {
insertText(customStyles, '');
}
customStyles.children[0].data += styles;
diff --git a/packages/optimizer/spec/transformers/valid/ServerSideRendering/empty_custom_styles/expected_output.html b/packages/optimizer/spec/transformers/valid/ServerSideRendering/empty_custom_styles/expected_output.html
new file mode 100644
index 000000000..b3652b3d4
--- /dev/null
+++ b/packages/optimizer/spec/transformers/valid/ServerSideRendering/empty_custom_styles/expected_output.html
@@ -0,0 +1,13 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/packages/optimizer/spec/transformers/valid/ServerSideRendering/empty_custom_styles/input.html b/packages/optimizer/spec/transformers/valid/ServerSideRendering/empty_custom_styles/input.html
new file mode 100644
index 000000000..dbb3c160e
--- /dev/null
+++ b/packages/optimizer/spec/transformers/valid/ServerSideRendering/empty_custom_styles/input.html
@@ -0,0 +1,14 @@
+
+
+
+
+
+
+
+
+
+
+
+
+