diff --git a/src/Psalm/Internal/PhpVisitor/Reflector/FunctionLikeDocblockParser.php b/src/Psalm/Internal/PhpVisitor/Reflector/FunctionLikeDocblockParser.php
index e2a2cc5a1..923313ec3 100644
--- a/src/Psalm/Internal/PhpVisitor/Reflector/FunctionLikeDocblockParser.php
+++ b/src/Psalm/Internal/PhpVisitor/Reflector/FunctionLikeDocblockParser.php
@@ -238,6 +238,8 @@ final class FunctionLikeDocblockParser
 
                 if (count($param_parts) >= 2) {
                     $info->taint_sink_params[] = ['name' => $param_parts[1], 'taint' => $param_parts[0]];
+                } else {
+                    throw new IncorrectDocblockException('@psalm-taint-sink expects 2 arguments');
                 }
             }
         }
@@ -279,6 +281,8 @@ final class FunctionLikeDocblockParser
 
                 if ($param_parts[0]) {
                     $info->taint_source_types[] = $param_parts[0];
+                } else {
+                    throw new IncorrectDocblockException('@psalm-taint-source expects 1 argument');
                 }
             }
         } elseif (isset($parsed_docblock->tags['return-taint'])) {