diff --git a/src/std_fns.rs b/src/std_fns.rs
index 49468c7..3a60f75 100644
--- a/src/std_fns.rs
+++ b/src/std_fns.rs
@@ -268,6 +268,8 @@ pub fn plus(stack: &mut Stack) -> OError {
             Mega,
             Long,
             Int,
+            Float,
+            Double,
         )
         .spl(),
     );
@@ -286,6 +288,8 @@ pub fn minus(stack: &mut Stack) -> OError {
             Mega,
             Long,
             Int,
+            Float,
+            Double,
         )
         .spl(),
     );
@@ -304,6 +308,8 @@ pub fn slash(stack: &mut Stack) -> OError {
             Mega,
             Long,
             Int,
+            Float,
+            Double,
         )
         .spl(),
     );
@@ -322,6 +328,8 @@ pub fn star(stack: &mut Stack) -> OError {
             Mega,
             Long,
             Int,
+            Float,
+            Double,
         )
         .spl(),
     );
@@ -336,7 +344,7 @@ pub fn percent(stack: &mut Stack) -> OError {
             a,
             b,
             rem,
-            stack.err(ErrorKind::InvalidCall("star".to_owned())),
+            stack.err(ErrorKind::InvalidCall("percent".to_owned())),
             Mega,
             Long,
             Int,