diff --git a/src/runtime/os_linux.go b/src/runtime/os_linux.go
index 7889973..dac4de4 100644
--- a/src/runtime/os_linux.go
+++ b/src/runtime/os_linux.go
@@ -193,6 +193,8 @@
 
 var procAuxv = []byte("/proc/self/auxv\x00")
 
+func mincore(addr unsafe.Pointer, n uintptr, dst *byte) int32
+
 func sysargs(argc int32, argv **byte) {
 	n := argc + 1
 
diff --git a/src/runtime/stubs.go b/src/runtime/stubs.go
index d9a7aa0..e1f43a5 100644
--- a/src/runtime/stubs.go
+++ b/src/runtime/stubs.go
@@ -131,7 +131,6 @@
 func cgocallback(fn, frame unsafe.Pointer, framesize, ctxt uintptr)
 func gogo(buf *gobuf)
 func gosave(buf *gobuf)
-func mincore(addr unsafe.Pointer, n uintptr, dst *byte) int32
 
 //go:noescape
 func jmpdefer(fv *funcval, argp uintptr)
diff --git a/src/runtime/sys_darwin_arm.s b/src/runtime/sys_darwin_arm.s
index ea559b5..5def776 100644
--- a/src/runtime/sys_darwin_arm.s
+++ b/src/runtime/sys_darwin_arm.s
@@ -19,7 +19,6 @@
 #define	SYS_mmap           197
 #define	SYS_munmap         73
 #define	SYS_madvise        75
-#define	SYS_mincore        78
 #define	SYS_gettimeofday   116
 #define	SYS_kill           37
 #define	SYS_getpid         20
@@ -150,15 +149,6 @@
 	SWI	$0x80
 	RET
 
-TEXT runtime·mincore(SB),NOSPLIT,$0
-	MOVW	addr+0(FP), R0
-	MOVW	n+4(FP), R1
-	MOVW	dst+8(FP), R2
-	MOVW	$SYS_mincore, R12
-	SWI	$0x80
-	MOVW	R0, ret+12(FP)
-	RET
-
 TEXT runtime·walltime(SB), 7, $32
 	MOVW	$8(R13), R0  // timeval
 	MOVW	$0, R1  // zone
diff --git a/src/runtime/sys_darwin_arm64.s b/src/runtime/sys_darwin_arm64.s
index 0e91d5b..34fb1f3 100644
--- a/src/runtime/sys_darwin_arm64.s
+++ b/src/runtime/sys_darwin_arm64.s
@@ -19,7 +19,6 @@
 #define	SYS_mmap           197
 #define	SYS_munmap         73
 #define	SYS_madvise        75
-#define	SYS_mincore        78
 #define	SYS_gettimeofday   116
 #define	SYS_kill           37
 #define	SYS_getpid         20