diff --git a/PROBLEMS b/PROBLEMS
index 3eaab01f2c..6ff48dc9e9 100644
--- a/PROBLEMS
+++ b/PROBLEMS
@@ -47,7 +47,7 @@ While running tests, running a parallell make is a bad idea.  Many test
 scripts use the same name for output and input files, which means different
 will interfere with each other and lead to test failure.
 
-The solution is simple for now: don't run parallell make when testing.
+The solution is simple for now: don't run parallel make when testing.
 
 
 * Bugs in gcc triggered