diff --git a/lib/libspl/include/os/windows/wosix.h b/lib/libspl/include/os/windows/wosix.h
index 4ea7f409f6ef..b94ee01106f4 100644
--- a/lib/libspl/include/os/windows/wosix.h
+++ b/lib/libspl/include/os/windows/wosix.h
@@ -95,6 +95,8 @@ extern FILE *wosix_freopen(const char *path, const char *mode, FILE *stream);
 /* Technically not needed, but handle mode */
 extern FILE *wosix_fopen(const char *name, const char *mode);
 
+extern int wosix_access(const char *name, int mode);
+
 /*
  * Thin wrapper for the POSIX IO calls, to translate to HANDLEs
  *
@@ -168,4 +170,5 @@ extern FILE *wosix_fopen(const char *name, const char *mode);
 #define	mmap wosix_mmap
 #define	munmap wosix_munmap
 #define	fopen	wosix_fopen
+#define	access	wosix_access
 #endif /* WOSIX_HEADER */
diff --git a/lib/libspl/os/windows/posix.c b/lib/libspl/os/windows/posix.c
index 158f2c55f34d..5bec552c0d97 100644
--- a/lib/libspl/os/windows/posix.c
+++ b/lib/libspl/os/windows/posix.c
@@ -1855,3 +1855,27 @@ timer_settime(timer_t, int, const struct itimerspec *__restrict,
 {
 	return (0);
 }
+
+int
+wosix_access(const char *name, int mode)
+{
+	DWORD dwAttrib = GetFileAttributes(name);
+	boolean_t isFile;
+
+	isFile = (dwAttrib != INVALID_FILE_ATTRIBUTES &&
+	    !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
+
+	if (!isFile) {
+		errno = ENOENT;
+		return (-1);
+	}
+
+	/* Windows does not have X_OK (execute), and it assert()s */
+	if (mode == X_OK)
+		return (0);
+
+	mode &= ~X_OK;
+
+#undef access
+	return (access(name, mode));
+}