diff --git a/lib/src/storage/backend/rocksdb.rs b/lib/src/storage/backend/rocksdb.rs
index 0d8b53b5..e3798220 100644
--- a/lib/src/storage/backend/rocksdb.rs
+++ b/lib/src/storage/backend/rocksdb.rs
@@ -1012,7 +1012,7 @@ unsafe impl Sync for ErrorStatus {}
 
 impl Drop for ErrorStatus {
     fn drop(&mut self) {
-        if self.0.string.is_null() {
+        if !self.0.string.is_null() {
             unsafe {
                 free(self.0.string as *mut c_void);
             }