diff --git a/qmake/common/unixconf.pri b/qmake/common/unixconf.pri
index ae6edbf50..1f76d324d 100644
--- a/qmake/common/unixconf.pri
+++ b/qmake/common/unixconf.pri
@@ -31,10 +31,8 @@ clang {
     # Has the potential to catch weird code
     QMAKE_CXXFLAGS_WARN_ON *= -Wdeprecated
 
-    # The -fno-pch-timestamp option is needed for Clang with ccache, this option will be
-    # used even when the ccache isn't used because is very hard to make 100% logic that
-    # will detect the ccache with qmake but it doesn't interfere with anything so it's ok
-    precompile_header {
+    # The -fno-pch-timestamp option is needed for Clang with ccache
+    ccache:precompile_header {
         # qmake on MSYS2 ignores the QMAKE_CXXFLAGS_PRECOMPILE variable
         mingw: \
             QMAKE_CXXFLAGS = -Xclang -fno-pch-timestamp $$QMAKE_CXXFLAGS