diff --git a/sal/osl/unx/process.cxx b/sal/osl/unx/process.cxx
index 861324963dec..f75534fdc311 100644
--- a/sal/osl/unx/process.cxx
+++ b/sal/osl/unx/process.cxx
@@ -1067,7 +1067,7 @@ oslProcessError SAL_CALL osl_getProcessInfo(oslProcess Process, oslProcessData F
                 unsigned long systemseconds;
 
                 clktck = sysconf(_SC_CLK_TCK);
-                if (clktck < 0) {
+                if (clktck <= 0) {
                     return osl_Process_E_Unknown;
                 }
                 hz = static_cast<unsigned long>(clktck);