diff --git a/compiler/cpp/src/thriftl.ll b/compiler/cpp/src/thriftl.ll
index 7e68dbc..e3478a6 100644
--- a/compiler/cpp/src/thriftl.ll
+++ b/compiler/cpp/src/thriftl.ll
@@ -116,7 +116,6 @@
 comment       ("//"[^\n]*)
 unixcomment   ("#"[^\n]*)
 symbol        ([:;\,\{\}\(\)\=<>\[\]])
-st_identifier ([a-zA-Z-](\.[a-zA-Z_0-9-]|[a-zA-Z_0-9-])*)
 literal_begin (['\"])
 
 %%
@@ -330,11 +329,6 @@
   return tok_identifier;
 }
 
-{st_identifier} {
-  yylval.id = strdup(yytext);
-  return tok_st_identifier;
-}
-
 {dubconstant} {
  /* Deliberately placed after identifier, since "e10" is NOT a double literal (THRIFT-3477) */
   yylval.dconst = atof(yytext);
diff --git a/compiler/cpp/src/thrifty.yy b/compiler/cpp/src/thrifty.yy
index 546196a..dee4cb9 100644
--- a/compiler/cpp/src/thrifty.yy
+++ b/compiler/cpp/src/thrifty.yy
@@ -99,7 +99,6 @@
 %token<id>     tok_identifier
 %token<id>     tok_literal
 %token<dtext>  tok_doctext
-%token<id>     tok_st_identifier
 
 /**
  * Constant values
diff --git a/test/ConstantsDemo.thrift b/test/ConstantsDemo.thrift
index 0e3c1d9..b99bdb2 100644
--- a/test/ConstantsDemo.thrift
+++ b/test/ConstantsDemo.thrift
@@ -48,6 +48,7 @@
 const string GEN_STRING = "asldkjasfd"
 
 const double e10 = 1e10   // fails with 0.9.3 and earlier
+const double e11 = -1e10  
 
 const map<i32,i32> GEN_MAP = { 35532 : 233, 43523 : 853 }
 const list<i32> GEN_LIST = [ 235235, 23598352, 3253523 ]