diff --git a/src/libs/utils/hostosinfo.h b/src/libs/utils/hostosinfo.h
index 72327a5c400..5d5f3909711 100644
--- a/src/libs/utils/hostosinfo.h
+++ b/src/libs/utils/hostosinfo.h
@@ -42,16 +42,16 @@ namespace Utils {
 class QTCREATOR_UTILS_EXPORT HostOsInfo
 {
 public:
-    static inline OsType hostOs();
+    static constexpr inline OsType hostOs();
 
     enum HostArchitecture { HostArchitectureX86, HostArchitectureAMD64, HostArchitectureItanium,
                             HostArchitectureArm, HostArchitectureUnknown };
     static HostArchitecture hostArchitecture();
 
-    static bool isWindowsHost() { return hostOs() == OsTypeWindows; }
-    static bool isLinuxHost() { return hostOs() == OsTypeLinux; }
-    static bool isMacHost() { return hostOs() == OsTypeMac; }
-    static inline bool isAnyUnixHost();
+    static constexpr bool isWindowsHost() { return hostOs() == OsTypeWindows; }
+    static constexpr bool isLinuxHost() { return hostOs() == OsTypeLinux; }
+    static constexpr bool isMacHost() { return hostOs() == OsTypeMac; }
+    static constexpr inline bool isAnyUnixHost();
 
     static QString withExecutableSuffix(const QString &executable)
     {
@@ -88,7 +88,7 @@ private:
 };
 
 
-OsType HostOsInfo::hostOs()
+constexpr OsType HostOsInfo::hostOs()
 {
 #if defined(Q_OS_WIN)
     return OsTypeWindows;
@@ -103,7 +103,7 @@ OsType HostOsInfo::hostOs()
 #endif
 }
 
-bool HostOsInfo::isAnyUnixHost()
+constexpr bool HostOsInfo::isAnyUnixHost()
 {
 #ifdef Q_OS_UNIX
     return true;