diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index e10156d8a..d08491f20 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -558,7 +558,7 @@ static void readLibprocRoots(const Path & storeDir, UncheckedRoots & unchecked)
                 }
             }
         } catch (SysError & e) {
-            if (errno == ENOENT || errno == EACCES || errno == ESRCH)
+            if (errno == ENOENT || errno == EACCES || errno == EPERM || errno == ESRCH)
                 continue;
             throw;
         }