diff --git a/arch/aarch64/bits/posix.h b/arch/aarch64/bits/posix.h
deleted file mode 100644
index c37b94c1..00000000
--- a/arch/aarch64/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFF64  1
-#define _POSIX_V7_LP64_OFF64  1
diff --git a/arch/arm/bits/posix.h b/arch/arm/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/arm/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/i386/bits/posix.h b/arch/i386/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/i386/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/loongarch64/bits/posix.h b/arch/loongarch64/bits/posix.h
deleted file mode 100644
index 8068ce98..00000000
--- a/arch/loongarch64/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFF64 1
-#define _POSIX_V7_LP64_OFF64 1
diff --git a/arch/m68k/bits/posix.h b/arch/m68k/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/m68k/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/microblaze/bits/posix.h b/arch/microblaze/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/microblaze/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/mips/bits/posix.h b/arch/mips/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/mips/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/mips64/bits/posix.h b/arch/mips64/bits/posix.h
deleted file mode 100644
index acf42944..00000000
--- a/arch/mips64/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFFBIG 1
-#define _POSIX_V7_LP64_OFFBIG 1
diff --git a/arch/mipsn32/bits/posix.h b/arch/mipsn32/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/mipsn32/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/or1k/bits/posix.h b/arch/or1k/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/or1k/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/powerpc/bits/posix.h b/arch/powerpc/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/powerpc/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/powerpc64/bits/posix.h b/arch/powerpc64/bits/posix.h
deleted file mode 100644
index c37b94c1..00000000
--- a/arch/powerpc64/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFF64  1
-#define _POSIX_V7_LP64_OFF64  1
diff --git a/arch/riscv32/bits/posix.h b/arch/riscv32/bits/posix.h
deleted file mode 100644
index 8897d37d..00000000
--- a/arch/riscv32/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG 1
-#define _POSIX_V7_ILP32_OFFBIG 1
diff --git a/arch/riscv64/bits/posix.h b/arch/riscv64/bits/posix.h
deleted file mode 100644
index 8068ce98..00000000
--- a/arch/riscv64/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFF64 1
-#define _POSIX_V7_LP64_OFF64 1
diff --git a/arch/s390x/bits/posix.h b/arch/s390x/bits/posix.h
deleted file mode 100644
index c37b94c1..00000000
--- a/arch/s390x/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFF64  1
-#define _POSIX_V7_LP64_OFF64  1
diff --git a/arch/sh/bits/posix.h b/arch/sh/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/sh/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/x32/bits/posix.h b/arch/x32/bits/posix.h
deleted file mode 100644
index 30a38714..00000000
--- a/arch/x32/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_ILP32_OFFBIG  1
-#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/x86_64/bits/posix.h b/arch/x86_64/bits/posix.h
deleted file mode 100644
index c37b94c1..00000000
--- a/arch/x86_64/bits/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#define _POSIX_V6_LP64_OFF64  1
-#define _POSIX_V7_LP64_OFF64  1
diff --git a/include/unistd.h b/include/unistd.h
index 5bc7f798..42b0e82b 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -257,7 +257,13 @@ pid_t gettid(void);
 
 #define _POSIX2_C_BIND          _POSIX_VERSION
 
-#include <bits/posix.h>
+#if __LONG_MAX == 0x7fffffffL
+#define _POSIX_V6_ILP32_OFFBIG  1
+#define _POSIX_V7_ILP32_OFFBIG  1
+#else
+#define _POSIX_V6_LP64_OFF64  1
+#define _POSIX_V7_LP64_OFF64  1
+#endif