diff --git a/mkspecs/features/cmake_functions.prf b/mkspecs/features/cmake_functions.prf
index 1e7c0e23f7..08295da75f 100644
--- a/mkspecs/features/cmake_functions.prf
+++ b/mkspecs/features/cmake_functions.prf
@@ -47,7 +47,7 @@ defineReplace(cmakePortablePaths) {
     for(v, variable) {
         out += ${CMAKE_FIND_ROOT_PATH}$$cmakeTargetPath($$v)
     }
-    return ($$join(out, " "))
+    return ($$join(out, ";"))
 }
 
 defineReplace(cmakeProcessLibs) {