diff --git a/ext/otel_observer.c b/ext/otel_observer.c
index 080db36..ff24b93 100644
--- a/ext/otel_observer.c
+++ b/ext/otel_observer.c
@@ -158,10 +158,10 @@ static bool func_has_withspan_attribute(zend_execute_data *ex) {
 static bool is_valid_attribute_value(zval *val) {
     switch (Z_TYPE_P(val)) {
     case IS_STRING:
-    case IS_LONG:   // Numeric (integer)
-    case IS_DOUBLE: // Numeric (floating point)
+    case IS_LONG:
+    case IS_DOUBLE:
     case IS_TRUE:
-    case IS_FALSE: // Boolean
+    case IS_FALSE:
     case IS_ARRAY:
         return true;
     default: