diff --git a/util/cmake/pro2cmake.py b/util/cmake/pro2cmake.py
index e3afce9c1b5..0403961cbd7 100755
--- a/util/cmake/pro2cmake.py
+++ b/util/cmake/pro2cmake.py
@@ -332,11 +332,13 @@ class Scope(object):
 
     @property
     def merge_debug(self) -> bool:
-        return self.getString('PRO2CMAKE_MERGE_DEBUG', None) != None
+        merge = self.getString('PRO2CMAKE_MERGE_DEBUG').lower()
+        return merge and (merge == '1' or merge == 'on' or merge == 'yes' or merge == 'true')
 
     @property
     def scope_debug(self) -> bool:
-        return self.getString('PRO2CMAKE_SCOPE_DEBUG', None) != None
+        merge = self.getString('PRO2CMAKE_SCOPE_DEBUG').lower()
+        return merge and (merge == '1' or merge == 'on' or merge == 'yes' or merge == 'true')
 
     @property
     def parent(self) -> typing.Optional[Scope]: