diff --git a/config.xsd b/config.xsd
index 3739c9ab0..d87a36de4 100644
--- a/config.xsd
+++ b/config.xsd
@@ -104,6 +104,7 @@
             <xs:element name="InvalidFunctionCall" type="IssueHandlerType" minOccurs="0" />
             <xs:element name="InvalidGlobal" type="IssueHandlerType" minOccurs="0" />
             <xs:element name="InvalidIterator" type="IssueHandlerType" minOccurs="0" />
+            <xs:element name="InvalidMethodCall" type="IssueHandlerType" minOccurs="0" />
             <xs:element name="InvalidOperand" type="IssueHandlerType" minOccurs="0" />
             <xs:element name="InvalidPropertyAssignment" type="IssueHandlerType" minOccurs="0" />
             <xs:element name="InvalidPropertyFetch" type="IssueHandlerType" minOccurs="0" />
diff --git a/src/Psalm/Checker/Statements/Expression/CallChecker.php b/src/Psalm/Checker/Statements/Expression/CallChecker.php
index df8523de2..cc0ecb6e8 100644
--- a/src/Psalm/Checker/Statements/Expression/CallChecker.php
+++ b/src/Psalm/Checker/Statements/Expression/CallChecker.php
@@ -21,6 +21,7 @@ use Psalm\Issue\ForbiddenCode;
 use Psalm\Issue\ImplicitToStringCast;
 use Psalm\Issue\InvalidArgument;
 use Psalm\Issue\InvalidFunctionCall;
+use Psalm\Issue\InvalidMethodCall;
 use Psalm\Issue\InvalidScalarArgument;
 use Psalm\Issue\InvalidScope;
 use Psalm\Issue\MixedArgument;
@@ -674,7 +675,7 @@ class CallChecker
                         case 'Psalm\\Type\\Atomic\\TString':
                         case 'Psalm\\Type\\Atomic\\TNumericString':
                             if (IssueBuffer::accepts(
-                                new InvalidArgument(
+                                new InvalidMethodCall(
                                     'Cannot call method ' . $stmt->name . ' on ' . $class_type . ' variable ' . $var_id,
                                     new CodeLocation($statements_checker->getSource(), $stmt)
                                 ),
diff --git a/src/Psalm/Issue/InvalidMethodCall.php b/src/Psalm/Issue/InvalidMethodCall.php
new file mode 100644
index 000000000..fe696147c
--- /dev/null
+++ b/src/Psalm/Issue/InvalidMethodCall.php
@@ -0,0 +1,6 @@
+<?php
+namespace Psalm\Issue;
+
+class InvalidMethodCall extends CodeError
+{
+}