diff --git a/jenkins_jobs/modules/parameters.py b/jenkins_jobs/modules/parameters.py
index fca02e1c2..37030617f 100644
--- a/jenkins_jobs/modules/parameters.py
+++ b/jenkins_jobs/modules/parameters.py
@@ -61,6 +61,8 @@ def string_param(registry, xml_parent, data):
     :arg str name: the name of the parameter
     :arg str default: the default value of the parameter (optional)
     :arg str description: a description of the parameter (optional)
+    :arg bool trim: strip whitespaces from the begnning and end
+        of the string (optional, default: false)
 
     Example::
 
@@ -69,11 +71,15 @@ def string_param(registry, xml_parent, data):
             name: FOO
             default: bar
             description: "A parameter named FOO, defaults to 'bar'."
+            trim: true
     """
-    base_param(
+    pdef = base_param(
         registry, xml_parent, data, True, "hudson.model.StringParameterDefinition"
     )
 
+    mapping = [("trim", "trim", False)]
+    helpers.convert_mapping_to_xml(pdef, data, mapping, fail_required=True)
+
 
 def promoted_param(registry, xml_parent, data):
     """yaml: promoted build
diff --git a/tests/macros/fixtures/wrapper/release_inner-macro-expansion-001.xml b/tests/macros/fixtures/wrapper/release_inner-macro-expansion-001.xml
index f6fe354e7..d3cf435a5 100644
--- a/tests/macros/fixtures/wrapper/release_inner-macro-expansion-001.xml
+++ b/tests/macros/fixtures/wrapper/release_inner-macro-expansion-001.xml
@@ -21,6 +21,7 @@
           <name>RELEASE_BRANCH</name>
           <description>Git branch to release from.</description>
           <defaultValue/>
+          <trim>false</trim>
         </hudson.model.StringParameterDefinition>
         <hudson.model.BooleanParameterDefinition>
           <name>FOO</name>
diff --git a/tests/parameters/string-param001.xml b/tests/parameters/string-param001.xml
new file mode 100644
index 000000000..39e81402d
--- /dev/null
+++ b/tests/parameters/string-param001.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project>
+  <properties>
+    <hudson.model.ParametersDefinitionProperty>
+      <parameterDefinitions>
+        <hudson.model.StringParameterDefinition>
+          <name>FOO</name>
+          <description>A parameter named FOO, defaults to 'bar'.</description>
+          <defaultValue>bar</defaultValue>
+          <trim>false</trim>
+        </hudson.model.StringParameterDefinition>
+      </parameterDefinitions>
+    </hudson.model.ParametersDefinitionProperty>
+  </properties>
+</project>
diff --git a/tests/parameters/string-param001.yaml b/tests/parameters/string-param001.yaml
new file mode 100644
index 000000000..b63de8e46
--- /dev/null
+++ b/tests/parameters/string-param001.yaml
@@ -0,0 +1,5 @@
+parameters:
+  - string:
+      name: FOO
+      default: bar
+      description: A parameter named FOO, defaults to 'bar'.
diff --git a/tests/parameters/string-param002.xml b/tests/parameters/string-param002.xml
new file mode 100644
index 000000000..7300cebfc
--- /dev/null
+++ b/tests/parameters/string-param002.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<project>
+  <properties>
+    <hudson.model.ParametersDefinitionProperty>
+      <parameterDefinitions>
+        <hudson.model.StringParameterDefinition>
+          <name>FOO</name>
+          <description>A parameter named FOO, defaults to 'bar'.</description>
+          <defaultValue>bar</defaultValue>
+          <trim>true</trim>
+        </hudson.model.StringParameterDefinition>
+      </parameterDefinitions>
+    </hudson.model.ParametersDefinitionProperty>
+  </properties>
+</project>
diff --git a/tests/parameters/string-param002.yaml b/tests/parameters/string-param002.yaml
new file mode 100644
index 000000000..4c93586ea
--- /dev/null
+++ b/tests/parameters/string-param002.yaml
@@ -0,0 +1,6 @@
+parameters:
+  - string:
+      name: FOO
+      default: bar
+      description: A parameter named FOO, defaults to 'bar'.
+      trim: true
diff --git a/tests/wrappers/fixtures/release001.xml b/tests/wrappers/fixtures/release001.xml
index 78af55cb3..db64b5d3d 100644
--- a/tests/wrappers/fixtures/release001.xml
+++ b/tests/wrappers/fixtures/release001.xml
@@ -10,6 +10,7 @@
           <name>RELEASE_BRANCH</name>
           <description>Git branch to release from.</description>
           <defaultValue/>
+          <trim>false</trim>
         </hudson.model.StringParameterDefinition>
         <hudson.model.BooleanParameterDefinition>
           <name>FOO</name>
diff --git a/tests/yamlparser/fixtures/variable_default_values.xml b/tests/yamlparser/fixtures/variable_default_values.xml
index a051363d9..61119939c 100644
--- a/tests/yamlparser/fixtures/variable_default_values.xml
+++ b/tests/yamlparser/fixtures/variable_default_values.xml
@@ -14,6 +14,7 @@
           <name>INT_DEFAULT</name>
           <description/>
           <defaultValue>0</defaultValue>
+          <trim>false</trim>
         </hudson.model.StringParameterDefinition>
       </parameterDefinitions>
     </hudson.model.ParametersDefinitionProperty>
@@ -39,6 +40,7 @@
           <name>INT_DEFAULT</name>
           <description/>
           <defaultValue>1</defaultValue>
+          <trim>false</trim>
         </hudson.model.StringParameterDefinition>
       </parameterDefinitions>
     </hudson.model.ParametersDefinitionProperty>