diff --git a/include/xo/parser/parser.hpp b/include/xo/parser/parser.hpp
index 39d768d8..a85f3a16 100644
--- a/include/xo/parser/parser.hpp
+++ b/include/xo/parser/parser.hpp
@@ -245,7 +245,7 @@ namespace xo {
             expraction on_symbol(const token_type & tk, exprstatestack * p_stack);
             expraction on_colon(exprstatestack * p_stack);
             expraction on_singleassign(exprstatestack * p_stack);
-            expraction on_f64(const token_type & tk);
+            expraction on_f64(const token_type & tk, exprstatestack * p_stack);
 
         private:
             /**
diff --git a/src/parser/parser.cpp b/src/parser/parser.cpp
index 7302bd3b..0bbe0167 100644
--- a/src/parser/parser.cpp
+++ b/src/parser/parser.cpp
@@ -442,7 +442,9 @@ namespace xo {
         }
 
         expraction
-        exprstate::on_f64(const token_type & tk) {
+        exprstate::on_f64(const token_type & tk,
+                          exprstatestack * /*p_stack*/)
+        {
             constexpr bool c_debug_flag = true;
             scope log(XO_DEBUG(c_debug_flag));
 
@@ -483,7 +485,7 @@ namespace xo {
                 return expraction();
 
             case tokentype::tk_f64:
-                return this->on_f64(tk);
+                return this->on_f64(tk, p_stack);
 
             case tokentype::tk_string:
                 assert(false);