diff --git a/src/Config/Environment.php b/src/Config/Environment.php
index 654a5c3011..6d7d0b21dc 100644
--- a/src/Config/Environment.php
+++ b/src/Config/Environment.php
@@ -287,7 +287,8 @@ public function setSharePrefix(string $sharePrefix): self
     public function docsPath(): ?string
     {
         if (!$this->docPrefix) {
-            $this->docPrefix = $this->findDocsPath($this->drushBasePath);
+            $foundPath = $this->findDocsPath($this->drushBasePath);
+            $this->docPrefix = $foundPath ?: null;
         }
         return $this->docPrefix;
     }