diff --git a/mozilla/content/html/style/src/nsCSSStyleRule.cpp b/mozilla/content/html/style/src/nsCSSStyleRule.cpp
index 5ddfe12b9ff..481c54f66da 100644
--- a/mozilla/content/html/style/src/nsCSSStyleRule.cpp
+++ b/mozilla/content/html/style/src/nsCSSStyleRule.cpp
@@ -36,6 +36,7 @@ static NS_DEFINE_IID(kStyleFontSID, NS_STYLEFONT_SID);
 static NS_DEFINE_IID(kStyleColorSID, NS_STYLECOLOR_SID);
 static NS_DEFINE_IID(kStyleListSID, NS_STYLELIST_SID);
 static NS_DEFINE_IID(kStyleSpacingSID, NS_STYLESPACING_SID);
+static NS_DEFINE_IID(kStyleMoleculeSID, NS_STYLEMOLECULE_SID);
 
 static NS_DEFINE_IID(kCSSFontSID, NS_CSS_FONT_SID);
 static NS_DEFINE_IID(kCSSColorSID, NS_CSS_COLOR_SID);
diff --git a/mozilla/layout/html/style/src/nsCSSStyleRule.cpp b/mozilla/layout/html/style/src/nsCSSStyleRule.cpp
index 5ddfe12b9ff..481c54f66da 100644
--- a/mozilla/layout/html/style/src/nsCSSStyleRule.cpp
+++ b/mozilla/layout/html/style/src/nsCSSStyleRule.cpp
@@ -36,6 +36,7 @@ static NS_DEFINE_IID(kStyleFontSID, NS_STYLEFONT_SID);
 static NS_DEFINE_IID(kStyleColorSID, NS_STYLECOLOR_SID);
 static NS_DEFINE_IID(kStyleListSID, NS_STYLELIST_SID);
 static NS_DEFINE_IID(kStyleSpacingSID, NS_STYLESPACING_SID);
+static NS_DEFINE_IID(kStyleMoleculeSID, NS_STYLEMOLECULE_SID);
 
 static NS_DEFINE_IID(kCSSFontSID, NS_CSS_FONT_SID);
 static NS_DEFINE_IID(kCSSColorSID, NS_CSS_COLOR_SID);
diff --git a/mozilla/layout/style/nsCSSStyleRule.cpp b/mozilla/layout/style/nsCSSStyleRule.cpp
index 5ddfe12b9ff..481c54f66da 100644
--- a/mozilla/layout/style/nsCSSStyleRule.cpp
+++ b/mozilla/layout/style/nsCSSStyleRule.cpp
@@ -36,6 +36,7 @@ static NS_DEFINE_IID(kStyleFontSID, NS_STYLEFONT_SID);
 static NS_DEFINE_IID(kStyleColorSID, NS_STYLECOLOR_SID);
 static NS_DEFINE_IID(kStyleListSID, NS_STYLELIST_SID);
 static NS_DEFINE_IID(kStyleSpacingSID, NS_STYLESPACING_SID);
+static NS_DEFINE_IID(kStyleMoleculeSID, NS_STYLEMOLECULE_SID);
 
 static NS_DEFINE_IID(kCSSFontSID, NS_CSS_FONT_SID);
 static NS_DEFINE_IID(kCSSColorSID, NS_CSS_COLOR_SID);