diff --git a/lib/edlang_check/src/lib.rs b/lib/edlang_check/src/lib.rs
index 7cb80df31..3a21fffb4 100644
--- a/lib/edlang_check/src/lib.rs
+++ b/lib/edlang_check/src/lib.rs
@@ -85,7 +85,6 @@ pub fn lowering_error_to_report(
                 .finish()
         },
         LoweringError::UnexpectedType { span, found, expected } => {
-            dbg!(span);
             let mut labels = vec![
                 Label::new((path.clone(), span.into()))
                         .with_message(format!("Unexpected type '{}', expected '{}'", found, expected.kind))
diff --git a/lib/edlang_lowering/src/lib.rs b/lib/edlang_lowering/src/lib.rs
index cd9aad355..7ac375a6b 100644
--- a/lib/edlang_lowering/src/lib.rs
+++ b/lib/edlang_lowering/src/lib.rs
@@ -745,7 +745,7 @@ fn lower_binary_expr(
 ) -> Result<(ir::RValue, TypeKind, Span), LoweringError> {
     trace!("lowering binary op: {:?}", op);
 
-    let (lhs, lhs_ty, _) = if type_hint.is_none() {
+    let (lhs, lhs_ty, lhs_span) = if type_hint.is_none() {
         let ty = find_expr_type(builder, lhs)
             .unwrap_or_else(|| find_expr_type(builder, rhs).expect("cant find type"));
         lower_expr(
@@ -759,7 +759,7 @@ fn lower_binary_expr(
     } else {
         lower_expr(builder, lhs, type_hint)?
     };
-    let (rhs, rhs_ty, _) = if type_hint.is_none() {
+    let (rhs, rhs_ty, rhs_span) = if type_hint.is_none() {
         let ty = find_expr_type(builder, rhs).unwrap_or(lhs_ty.clone());
         lower_expr(
             builder,
@@ -773,6 +773,17 @@ fn lower_binary_expr(
         lower_expr(builder, rhs, type_hint)?
     };
 
+    if lhs_ty != rhs_ty {
+        return Err(LoweringError::UnexpectedType {
+            span: rhs_span,
+            found: rhs_ty,
+            expected: TypeInfo {
+                span: Some(lhs_span),
+                kind: lhs_ty,
+            },
+        });
+    }
+
     let lhs = match lhs {
         RValue::Use(op, _span) => op,
         lhs => {