diff --git a/syntax/sass.vim b/syntax/sass.vim
index 67d6d88..27bfc35 100644
--- a/syntax/sass.vim
+++ b/syntax/sass.vim
@@ -33,7 +33,7 @@ syn match sassFunction "\<\%(unquote\|quote\)\>(\@=" contained
 syn match sassFunction "\<\%(percentage\|round\|ceil\|floor\|abs\)\>(\@=" contained
 syn match sassFunction "\<\%(type-of\|unit\|unitless\|comparable\)\>(\@=" contained
 
-syn region sassInterpolation matchgroup=sassInterpolationDelimiter start="#{" end="}" contains=@sassCssAttributes,sassVariable,sassFunction
+syn region sassInterpolation matchgroup=sassInterpolationDelimiter start="#{" end="}" contains=@sassCssAttributes,sassVariable,sassFunction containedin=cssStringQ,cssStringQQ
 
 syn match sassMixinName "[[:alnum:]_-]\+" contained nextgroup=sassCssAttribute
 syn match sassMixin  "^="               nextgroup=sassMixinName