diff --git a/src/librustdoc/html/static/themes/dark.css b/src/librustdoc/html/static/themes/dark.css
index e3bb41ae672f4..f1255f5224737 100644
--- a/src/librustdoc/html/static/themes/dark.css
+++ b/src/librustdoc/html/static/themes/dark.css
@@ -184,12 +184,12 @@ a.test-arrow {
 	color: #ddd;
 }
 
-.stab.unstable {background: #FFF5D6; border-color: #FFC600; color: #2f2f2f; }
+.stab.unstable { background: #FFF5D6; border-color: #FFC600; color: #2f2f2f; }
 .stab.internal { background: #FFB9B3; border-color: #B71C1C; color: #2f2f2f; }
 .stab.deprecated { background: #F3DFFF; border-color: #7F0087; color: #2f2f2f; }
 .stab.portability { background: #C4ECFF; border-color: #7BA5DB; color: #2f2f2f; }
 
-.stab > code {
+.stab.portability > code {
 	color: #ddd;
 }
 
diff --git a/src/librustdoc/html/static/themes/light.css b/src/librustdoc/html/static/themes/light.css
index dd4d028c6c9be..c052e6b37ade7 100644
--- a/src/librustdoc/html/static/themes/light.css
+++ b/src/librustdoc/html/static/themes/light.css
@@ -190,7 +190,7 @@ a.test-arrow {
 .stab.deprecated { background: #F3DFFF; border-color: #7F0087; }
 .stab.portability { background: #C4ECFF; border-color: #7BA5DB; }
 
-.stab > code {
+.stab.portability > code {
 	color: #000;
 }