diff --git a/x-pack/plugins/fleet/server/services/package_policy.test.ts b/x-pack/plugins/fleet/server/services/package_policy.test.ts
index edb49a7bf5c70..cce3b3be30c67 100644
--- a/x-pack/plugins/fleet/server/services/package_policy.test.ts
+++ b/x-pack/plugins/fleet/server/services/package_policy.test.ts
@@ -1979,6 +1979,10 @@ describe('Package policy service', () => {
                   type: 'text',
                   value: ['/var/log/logfile.log'],
                 },
+                is_value_enabled: {
+                  type: 'bool',
+                  value: false,
+                },
               },
               streams: [],
             },
@@ -2009,6 +2013,10 @@ describe('Package policy service', () => {
                       name: 'path',
                       type: 'text',
                     },
+                    {
+                      name: 'is_value_enabled',
+                      type: 'bool',
+                    },
                   ],
                 },
               ],
@@ -2028,6 +2036,10 @@ describe('Package policy service', () => {
                 type: 'text',
                 value: '/var/log/new-logfile.log',
               },
+              is_value_enabled: {
+                type: 'bool',
+                value: 'true',
+              },
             },
           },
         ];
@@ -2041,6 +2053,7 @@ describe('Package policy service', () => {
           false
         );
         expect(result.inputs[0]?.vars?.path.value).toEqual(['/var/log/logfile.log']);
+        expect(result.inputs[0]?.vars?.is_value_enabled.value).toEqual(false);
       });
     });
 
diff --git a/x-pack/plugins/fleet/server/services/package_policy.ts b/x-pack/plugins/fleet/server/services/package_policy.ts
index cbd1c1f882ebd..1ebb2faa0449c 100644
--- a/x-pack/plugins/fleet/server/services/package_policy.ts
+++ b/x-pack/plugins/fleet/server/services/package_policy.ts
@@ -1289,7 +1289,7 @@ function deepMergeVars(original: any, override: any, keepOriginalValue = false):
 
     // Ensure that any value from the original object is persisted on the newly merged resulting object,
     // even if we merge other data about the given variable
-    if (keepOriginalValue && originalVar?.value) {
+    if (keepOriginalValue && originalVar?.value !== undefined) {
       result.vars[name].value = originalVar.value;
     }
   }