diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5acac0d0..7b84ecf2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -316,10 +316,8 @@ if (MSVC90)
 endif()
 
 # Workaround for -std=c99 on Linux disabling _DEFAULT_SOURCE (POSIX 2008 and more)
-if (GLFW_BUILD_X11 OR GLFW_BUILD_WAYLAND)
-    if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
-        target_compile_definitions(glfw PRIVATE _DEFAULT_SOURCE)
-    endif()
+if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    target_compile_definitions(glfw PRIVATE _DEFAULT_SOURCE)
 endif()
 
 if (GLFW_BUILD_SHARED_LIBRARY)
diff --git a/src/posix_time.h b/src/posix_time.h
index 94374adb..f27027e6 100644
--- a/src/posix_time.h
+++ b/src/posix_time.h
@@ -29,6 +29,7 @@
 
 #include <stdint.h>
 #include <time.h>
+#include <sys/types.h>
 
 
 // POSIX-specific global timer data