diff --git a/CMakeLists.txt b/CMakeLists.txt
index 75e81ce09..7b0183a5e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ cmake_minimum_required(VERSION 3.9)
 
 project(FreeRDP C)
 
-set(CMAKE_C_STANDARD 99)
+set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_C_EXTENSIONS ON)
 
diff --git a/rdtk/CMakeLists.txt b/rdtk/CMakeLists.txt
index 02848efdd..913d59066 100644
--- a/rdtk/CMakeLists.txt
+++ b/rdtk/CMakeLists.txt
@@ -27,7 +27,7 @@ if (NOT FREERDP_UNIFIED_BUILD)
 	cmake_minimum_required(VERSION 3.9)
 	project(RdTk VERSION ${RDTK_VERSION} LANGUAGES C)
 
-	set(CMAKE_C_STANDARD 99)
+	set(CMAKE_C_STANDARD 11)
 	set(CMAKE_C_STANDARD_REQUIRED ON)
 	set(CMAKE_C_EXTENSIONS ON)
 
diff --git a/server/proxy/modules/capture/CMakeLists.txt b/server/proxy/modules/capture/CMakeLists.txt
index eaa045244..650c983b0 100644
--- a/server/proxy/modules/capture/CMakeLists.txt
+++ b/server/proxy/modules/capture/CMakeLists.txt
@@ -23,6 +23,10 @@ cmake_minimum_required(VERSION 3.9)
 
 project(proxy-capture-plugin VERSION 1.0.0 LANGUAGES C)
 
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_C_EXTENSIONS ON)
+
 include(CheckIPOSupported)
 check_ipo_supported(RESULT supported OUTPUT error)
 if (supported)
diff --git a/uwac/CMakeLists.txt b/uwac/CMakeLists.txt
index d5354ece8..bde20e337 100644
--- a/uwac/CMakeLists.txt
+++ b/uwac/CMakeLists.txt
@@ -27,7 +27,7 @@ if (NOT FREERDP_UNIFIED_BUILD)
 	cmake_minimum_required(VERSION 3.9)
 	project(uwac VERSION ${UWAC_VERSION} LANGUAGES C)
 
-	set(CMAKE_C_STANDARD 99)
+	set(CMAKE_C_STANDARD 11)
 	set(CMAKE_C_STANDARD_REQUIRED ON)
 	set(CMAKE_C_EXTENSIONS ON)
 
diff --git a/winpr/CMakeLists.txt b/winpr/CMakeLists.txt
index ca7711c78..3e8eb73e6 100644
--- a/winpr/CMakeLists.txt
+++ b/winpr/CMakeLists.txt
@@ -19,7 +19,7 @@ if (NOT FREERDP_UNIFIED_BUILD)
 	cmake_minimum_required(VERSION 3.9)
 	project(WinPR LANGUAGES C)
 
-	set(CMAKE_C_STANDARD 99)
+	set(CMAKE_C_STANDARD 11)
 	set(CMAKE_C_STANDARD_REQUIRED ON)
 	set(CMAKE_C_EXTENSIONS ON)