diff --git a/src/core/utilities.cpp b/src/core/utilities.cpp
index 4c21b3f93..8baf49ceb 100644
--- a/src/core/utilities.cpp
+++ b/src/core/utilities.cpp
@@ -658,7 +658,7 @@ QString DecodeHtmlEntities(const QString &text) {
 
 }
 
-int SetThreadIOPriority(const IoPriority priority) {
+long SetThreadIOPriority(const IoPriority priority) {
 
 #ifdef Q_OS_LINUX
   return syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, GetThreadId(), 4 | priority << IOPRIO_CLASS_SHIFT);
@@ -671,7 +671,7 @@ int SetThreadIOPriority(const IoPriority priority) {
 
 }
 
-int GetThreadId() {
+long GetThreadId() {
 
 #ifdef Q_OS_LINUX
   return syscall(SYS_gettid);
diff --git a/src/core/utilities.h b/src/core/utilities.h
index 823ec32b0..a6fac205b 100644
--- a/src/core/utilities.h
+++ b/src/core/utilities.h
@@ -122,8 +122,8 @@ enum IoPriority {
   };
 static const int IOPRIO_CLASS_SHIFT = 13;
 
-int SetThreadIOPriority(const IoPriority priority);
-int GetThreadId();
+long SetThreadIOPriority(const IoPriority priority);
+long GetThreadId();
 
 QString GetRandomStringWithChars(const int len);
 QString GetRandomStringWithCharsAndNumbers(const int len);