diff --git a/docs/usage.rst b/docs/usage.rst
index 64fdedf..db70a2d 100644
--- a/docs/usage.rst
+++ b/docs/usage.rst
@@ -177,7 +177,7 @@ be passed specifying options for the function call.
 
     // ...
     $options = [
-        'rtrim' => false
+        'rtrim' => true
     ];
 
     $function->invoke($parameters, $options);
@@ -191,7 +191,7 @@ rtrim
     ``rtrim`` option is available. If set to ``true``, type C strings are right-trimmed before
     being returned.
 
-    *Default:* ``true``
+    *Default:* ``false``
 
 Activating/Deactivating parameters
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/sapnwrfc.c b/sapnwrfc.c
index 96f43a2..7a46bb1 100644
--- a/sapnwrfc.c
+++ b/sapnwrfc.c
@@ -682,7 +682,7 @@ PHP_METHOD(RemoteFunction, invoke)
     zval *val;
     zval retval;
     SAP_UC *parameter_name_u;
-    unsigned char rtrim_enabled = 1;
+    unsigned char rtrim_enabled = 0;
 
     zend_replace_error_handling(EH_THROW, sapnwrfc_function_exception_ce, NULL);
 
diff --git a/tests/041_invoke_returns_result.phpt b/tests/041_invoke_returns_result.phpt
index 6fe777a..41f78d3 100644
--- a/tests/041_invoke_returns_result.phpt
+++ b/tests/041_invoke_returns_result.phpt
@@ -44,8 +44,8 @@ var_dump($result["ECHOSTRUCT"]["RFCFLOAT"] == $importStruct["RFCFLOAT"]);
 var_dump($result["ECHOSTRUCT"]["RFCINT1"] == $importStruct["RFCINT1"]);
 var_dump($result["ECHOSTRUCT"]["RFCINT2"] == $importStruct["RFCINT2"]);
 var_dump($result["ECHOSTRUCT"]["RFCINT4"] == $importStruct["RFCINT4"]);
-var_dump($result["ECHOSTRUCT"]["RFCDATA1"] == $importStruct["RFCDATA1"]);
-var_dump($result["ECHOSTRUCT"]["RFCDATA2"] == $importStruct["RFCDATA2"]);
+var_dump($result["ECHOSTRUCT"]["RFCDATA1"] == str_pad($importStruct["RFCDATA1"], 50, ' ', STR_PAD_RIGHT));
+var_dump($result["ECHOSTRUCT"]["RFCDATA2"] == str_pad($importStruct["RFCDATA2"], 50, ' ', STR_PAD_RIGHT));
 
 var_dump(count($result["RFCTABLE"]) == 2);
 var_dump($result["RFCTABLE"][1]["RFCFLOAT"] == $importStruct["RFCFLOAT"] + 1);
diff --git a/tests/084_rtrim_enabled_by_default.phpt b/tests/084_rtrim_disabled_by_default.phpt
similarity index 77%
rename from tests/084_rtrim_enabled_by_default.phpt
rename to tests/084_rtrim_disabled_by_default.phpt
index aeda000..af3e112 100644
--- a/tests/084_rtrim_enabled_by_default.phpt
+++ b/tests/084_rtrim_disabled_by_default.phpt
@@ -1,5 +1,5 @@
 --TEST--
-rtrim is enabled by default.
+rtrim is disabled by default.
 --SKIPIF--
 <?php include("should_run_online_tests.inc"); ?>
 --FILE--
@@ -28,8 +28,8 @@ $f = $c->getFunction("STFC_STRUCTURE");
 $f->setParameterActive('RFCTABLE', false);
 $ret = $f->invoke($params);
 
-var_dump($ret['ECHOSTRUCT']['RFCDATA1'] == '1DATA1');
-var_dump($ret['ECHOSTRUCT']['RFCDATA2'] == 'DATA222');
+var_dump($ret['ECHOSTRUCT']['RFCDATA1'] == str_pad('1DATA1', 50, ' ', STR_PAD_RIGHT));
+var_dump($ret['ECHOSTRUCT']['RFCDATA2'] == str_pad('DATA222', 50, ' ', STR_PAD_RIGHT));
 
 --EXPECT--
 bool(true)
diff --git a/tests/085_returned_CHAR_is_not_right_trimmed_when_rtrim_option_disabled.phpt b/tests/085_returned_CHAR_is_not_right_trimmed_when_rtrim_option_disabled.phpt
index 801f721..24c1cd2 100644
--- a/tests/085_returned_CHAR_is_not_right_trimmed_when_rtrim_option_disabled.phpt
+++ b/tests/085_returned_CHAR_is_not_right_trimmed_when_rtrim_option_disabled.phpt
@@ -1,5 +1,5 @@
 --TEST--
-Returned CHAR value is not right-trimmed when rtrim option disabled.
+Returned CHAR value is right-trimmed when rtrim option enabled.
 --SKIPIF--
 <?php include("should_run_online_tests.inc"); ?>
 --FILE--
@@ -27,10 +27,10 @@ $params = [
 $f = $c->getFunction("STFC_STRUCTURE");
 $f->setParameterActive('RFCTABLE', false);
 
-$ret = $f->invoke($params, ['rtrim' => false]);
+$ret = $f->invoke($params, ['rtrim' => true]);
 
-var_dump($ret['ECHOSTRUCT']['RFCDATA1'] == str_pad('1DATA1', 50, ' ', STR_PAD_RIGHT));
-var_dump($ret['ECHOSTRUCT']['RFCDATA2'] == str_pad('DATA222', 50, ' ', STR_PAD_RIGHT));
+var_dump($ret['ECHOSTRUCT']['RFCDATA1'] == '1DATA1');
+var_dump($ret['ECHOSTRUCT']['RFCDATA2'] == 'DATA222');
 
 --EXPECT--
 bool(true)