diff --git a/qmake/features/private/tiny_ccache_version.prf b/qmake/features/private/tiny_ccache_version.prf
index b25f65f74..ad0d105c9 100644
--- a/qmake/features/private/tiny_ccache_version.prf
+++ b/qmake/features/private/tiny_ccache_version.prf
@@ -21,7 +21,7 @@ defineTest(tiny_should_disable_precompile_headers) {
     # w/o it the exit code is 1). In this case don't disable PCH and even don't cache
     # the TINY_CCACHE_VERSION because the build is gona to fail and we don't want to
     # cache a wrong value
-    !system("ccache --version"): \
+    !system("ccache --version 1>$$QMAKE_SYSTEM_NULL_DEVICE 2>$$QMAKE_SYSTEM_NULL_DEVICE"): \
         return(false)
 
     exitCode = 1