diff --git a/CMakeLists.txt b/CMakeLists.txt
index 28d15f6d6..ab7ee19e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@
 #
 # SPDX-License-Identifier: CC0-1.0
 
-cmake_minimum_required(VERSION 4.4.0...4.4.1)
+cmake_minimum_required(VERSION 3.24...4.4.1)
 project(retroshare
 	VERSION 0.6.7
 	LANGUAGES CXX C
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 59af8e899..bd9da7d2e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -11,9 +11,12 @@ target_sources(${PROJECT_NAME}
 
 	PRIVATE FILE_SET private_HEADERS TYPE HEADERS
 	BASE_DIRS ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR}
-
-	PRIVATE FILE_SET SOURCES
 )
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "4.4")
+	target_sources(${PROJECT_NAME}
+		PRIVATE FILE_SET SOURCES
+	)
+endif()
 
 list(APPEND RS_PUBLIC_HEADERS
 	retroshare/rsexpr.h
@@ -874,8 +877,16 @@ target_sources(${PROJECT_NAME}
 	## libretroshare doesn't hide implementation details properly so it
 	## is necessary to flag all implementation headers as public.
 	${RS_IMPLEMENTATION_HEADERS}
-
-	PRIVATE FILE_SET SOURCES
-	FILES
-	${RS_SOURCES}
 )
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "4.4")
+	target_sources(${PROJECT_NAME}
+		PRIVATE FILE_SET SOURCES
+		FILES
+		${RS_SOURCES}
+	)
+else()
+	target_sources(${PROJECT_NAME}
+		PRIVATE
+		${RS_SOURCES}
+	)
+endif()