diff --git a/lib/core_assertions.rb b/lib/core_assertions.rb
index 00d180f..02038aa 100644
--- a/lib/core_assertions.rb
+++ b/lib/core_assertions.rb
@@ -835,6 +835,9 @@ def assert_all_assertions_foreach(msg = nil, *keys, &block)
             rescue
               # Constants may be defined but not implemented, e.g., mingw.
             else
+              unless Process.clock_getres(clk) < 1.0e-03
+                next # needs msec precision
+              end
               PERFORMANCE_CLOCK = clk
             end
           end