diff --git a/gnu/packages.scm b/gnu/packages.scm
index 1a37a17342722d1cbe348d6b0cd7297eccf1aa2b..7b954769e96ff9a6027a167c8049b30e637f236b 100644
--- a/gnu/packages.scm
+++ b/gnu/packages.scm
@@ -188,7 +188,7 @@ (define find-packages-by-name
                             version>?)))
         (if version
             (filter (lambda (package)
-                      (string-prefix? version (package-version package)))
+                      (version-prefix? version (package-version package)))
                     matching)
             matching)))))