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-rw-r--r--src/libexpr/lexer.l2
-rw-r--r--src/libexpr/parser.y1
2 files changed, 3 insertions, 0 deletions
diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l
index 5d0360401d..911850cc5b 100644
--- a/src/libexpr/lexer.l
+++ b/src/libexpr/lexer.l
@@ -117,6 +117,8 @@ or          { return OR_KW; }
               return INT;
             }
 
+\$\{        { return DOLLAR_CURLY; }
+
 \"          { BEGIN(STRING); return '"'; }
 <STRING>([^\$\"\\]|\$[^\{\"]|\\.)+ {
               /* !!! Not quite right: we want a follow restriction on
diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y
index 28972cf724..2305843882 100644
--- a/src/libexpr/parser.y
+++ b/src/libexpr/parser.y
@@ -509,6 +509,7 @@ attr
 
 string_attr
   : '"' string_parts '"' { $$ = $2; }
+  | DOLLAR_CURLY expr '}' { $$ = $2; }
   ;
 
 expr_list