diff --git a/mkspecs/common/android/qplatformdefs.h b/mkspecs/common/android/qplatformdefs.h
index f75bc4093b..2bd59410d4 100644
--- a/mkspecs/common/android/qplatformdefs.h
+++ b/mkspecs/common/android/qplatformdefs.h
@@ -144,11 +144,7 @@
 #define QT_SIGNAL_ARGS          int
 #define QT_SIGNAL_IGNORE        SIG_IGN
 
-#if defined(__GLIBC__) && (__GLIBC__ >= 2)
 #define QT_SOCKLEN_T            socklen_t
-#else
-#define QT_SOCKLEN_T            int
-#endif
 
 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
 #define QT_SNPRINTF             ::snprintf
diff --git a/mkspecs/linux-clang/qplatformdefs.h b/mkspecs/linux-clang/qplatformdefs.h
index 34cd665883..c1ab72fbc6 100644
--- a/mkspecs/linux-clang/qplatformdefs.h
+++ b/mkspecs/linux-clang/qplatformdefs.h
@@ -79,10 +79,6 @@
 #define QT_USE_XOPEN_LFS_EXTENSIONS
 #include "../common/posix/qplatformdefs.h"
 
-#undef QT_SOCKLEN_T
-
-#define QT_SOCKLEN_T            socklen_t
-
 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
 #define QT_SNPRINTF             ::snprintf
 #define QT_VSNPRINTF            ::vsnprintf
diff --git a/mkspecs/linux-g++/qplatformdefs.h b/mkspecs/linux-g++/qplatformdefs.h
index 13523f0702..4d2750d9ec 100644
--- a/mkspecs/linux-g++/qplatformdefs.h
+++ b/mkspecs/linux-g++/qplatformdefs.h
@@ -79,14 +79,6 @@
 #define QT_USE_XOPEN_LFS_EXTENSIONS
 #include "../common/posix/qplatformdefs.h"
 
-#undef QT_SOCKLEN_T
-
-#if defined(__GLIBC__) && (__GLIBC__ < 2)
-#define QT_SOCKLEN_T            int
-#else
-#define QT_SOCKLEN_T            socklen_t
-#endif
-
 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
 #define QT_SNPRINTF             ::snprintf
 #define QT_VSNPRINTF            ::vsnprintf
diff --git a/mkspecs/linux-llvm/qplatformdefs.h b/mkspecs/linux-llvm/qplatformdefs.h
index dc750ab1ef..d3cc39b47f 100644
--- a/mkspecs/linux-llvm/qplatformdefs.h
+++ b/mkspecs/linux-llvm/qplatformdefs.h
@@ -80,14 +80,6 @@
 #define QT_USE_XOPEN_LFS_EXTENSIONS
 #include "../common/posix/qplatformdefs.h"
 
-#undef QT_SOCKLEN_T
-
-#if defined(__GLIBC__) && (__GLIBC__ >= 2)
-#define QT_SOCKLEN_T            socklen_t
-#else
-#define QT_SOCKLEN_T            int
-#endif
-
 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
 #define QT_SNPRINTF             ::snprintf
 #define QT_VSNPRINTF            ::vsnprintf
diff --git a/mkspecs/linux-lsb-g++/qplatformdefs.h b/mkspecs/linux-lsb-g++/qplatformdefs.h
index 4c4e53da2a..83baffb3e3 100644
--- a/mkspecs/linux-lsb-g++/qplatformdefs.h
+++ b/mkspecs/linux-lsb-g++/qplatformdefs.h
@@ -85,16 +85,9 @@
 #include "../common/posix/qplatformdefs.h"
 
 #undef QT_OPEN_LARGEFILE
-#undef QT_SOCKLEN_T
 
 #define QT_OPEN_LARGEFILE       0
 
-#if defined(__GLIBC__) && (__GLIBC__ >= 2)
-#define QT_SOCKLEN_T            socklen_t
-#else
-#define QT_SOCKLEN_T            int
-#endif
-
 #ifndef SIOCGIFBRDADDR
 #  define SIOCGIFBRDADDR 0x8919
 #endif
diff --git a/mkspecs/lynxos-g++/qplatformdefs.h b/mkspecs/lynxos-g++/qplatformdefs.h
index 4339ea2b23..6007af0055 100644
--- a/mkspecs/lynxos-g++/qplatformdefs.h
+++ b/mkspecs/lynxos-g++/qplatformdefs.h
@@ -72,14 +72,6 @@
 
 #include "../common/posix/qplatformdefs.h"
 
-#undef QT_SOCKLEN_T
-
-#if defined(__GLIBC__) && (__GLIBC__ >= 2)
-#define QT_SOCKLEN_T            socklen_t
-#else
-#define QT_SOCKLEN_T            int
-#endif
-
 #if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
 #define QT_SNPRINTF             ::snprintf
 #define QT_VSNPRINTF            ::vsnprintf