diff --git a/tc/emp_ematch.y b/tc/emp_ematch.y
index 7043a80b..bc08da20 100644
--- a/tc/emp_ematch.y
+++ b/tc/emp_ematch.y
@@ -9,7 +9,7 @@
 %locations
 %token-table
 %error-verbose
-%name-prefix="ematch_"
+%name-prefix "ematch_"
 
 %union {
 	unsigned int i;