diff --git a/prog.gem b/prog.gem
new file mode 100644
index 0000000..d4504b9
--- /dev/null
+++ b/prog.gem
@@ -0,0 +1 @@
+foo(1,2,bar)
\ No newline at end of file
diff --git a/src/yacc/parser.y b/src/yacc/parser.y
index 7e3ef61..4941825 100644
--- a/src/yacc/parser.y
+++ b/src/yacc/parser.y
@@ -58,7 +58,7 @@
 /* Operator associativity */
 %right '='
 %left '+' '-' '*' '/'
-%left OpEquals OpNot
+%left OpEquals OpNot '<' '>'
 %left OpAnd OpOr OpXor
 %left OpBitand OpBitor OpBitxor OpBitnot
 
@@ -108,7 +108,9 @@ oparith: expr '+' expr
     | expr '/' expr
     | '-' expr %prec '*';
 
-oplogic: expr OpEquals expr;
+oplogic: expr OpEquals expr
+    | expr '<' expr
+    | expr '>' expr;
 
 opbool: expr OpAnd expr
     | expr OpOr expr