diff --git a/antlr/pdp7asm.g4 b/antlr/pdp7asm.g4
index 4c89111..9ae4db9 100644
--- a/antlr/pdp7asm.g4
+++ b/antlr/pdp7asm.g4
@@ -57,7 +57,7 @@ argument
     ;
 
 assignment
-    : variable '=' expression
+    : (variable | LOC | RELOC) '=' expression
     ;
 
 expression