diff --git a/cmdline/handle.c b/cmdline/handle.c
index 531ba1e7..69e9f386 100644
--- a/cmdline/handle.c
+++ b/cmdline/handle.c
@@ -272,24 +272,9 @@ int handle_read(struct snapraid_handle* handle, block_off_t file_pos, unsigned c
 
 	read_size = file_block_size(handle->file, file_pos, block_size);
 
-#if !HAVE_PREAD
-	if (lseek(handle->f, offset, SEEK_SET) != offset) {
-		/* LCOV_EXCL_START */
-		out("Error seeking file '%s' at offset %" PRIu64 ". %s.\n", handle->path, offset, strerror(errno));
-		return -1;
-		/* LCOV_EXCL_STOP */
-	}
-#endif
-
 	count = 0;
 	do {
-
-#if HAVE_PREAD
 		read_ret = pread(handle->f, block_buffer + count, read_size - count, offset + count);
-#else
-		read_ret = read(handle->f, block_buffer + count, read_size - count);
-#endif
-
 		if (read_ret < 0) {
 			/* LCOV_EXCL_START */
 			out("Error reading file '%s' at offset %" PRIu64 " for size %u. %s.\n", handle->path, offset + count, read_size - count, strerror(errno));
@@ -333,18 +318,7 @@ int handle_write(struct snapraid_handle* handle, block_off_t file_pos, unsigned
 
 	write_size = file_block_size(handle->file, file_pos, block_size);
 
-#if HAVE_PWRITE
 	write_ret = pwrite(handle->f, block_buffer, write_size, offset);
-#else
-	if (lseek(handle->f, offset, SEEK_SET) != offset) {
-		/* LCOV_EXCL_START */
-		log_fatal("Error seeking file '%s'. %s.\n", handle->path, strerror(errno));
-		return -1;
-		/* LCOV_EXCL_STOP */
-	}
-
-	write_ret = write(handle->f, block_buffer, write_size);
-#endif
 	if (write_ret != (ssize_t)write_size) { /* conversion is safe because block_size is always small */
 		/* LCOV_EXCL_START */
 		log_fatal("Error writing file '%s'. %s.\n", handle->path, strerror(errno));
diff --git a/cmdline/mingw.h b/cmdline/mingw.h
index 21f309e1..aeb34def 100644
--- a/cmdline/mingw.h
+++ b/cmdline/mingw.h
@@ -109,8 +109,6 @@
 #define write windows_write
 #undef lseek
 #define lseek windows_lseek
-#define HAVE_PREAD 1
-#define HAVE_PWRITE 1
 #undef pread
 #define pread windows_pread
 #undef pwrite
diff --git a/cmdline/parity.c b/cmdline/parity.c
index 92d2db8c..ab7ce9ac 100644
--- a/cmdline/parity.c
+++ b/cmdline/parity.c
@@ -433,22 +433,7 @@ int parity_write(struct snapraid_parity_handle* parity, block_off_t pos, unsigne
 
 	offset = pos * (data_off_t)block_size;
 
-#if HAVE_PWRITE
 	write_ret = pwrite(parity->f, block_buffer, block_size, offset);
-#else
-	if (lseek(parity->f, offset, SEEK_SET) != offset) {
-		/* LCOV_EXCL_START */
-		if (errno == ENOSPC) {
-			log_fatal("Failed to grow parity file '%s' using lseek due lack of space.\n", parity->path);
-		} else {
-			log_fatal("Error seeking file '%s'. %s.\n", parity->path, strerror(errno));
-		}
-		return -1;
-		/* LCOV_EXCL_STOP */
-	}
-
-	write_ret = write(parity->f, block_buffer, block_size);
-#endif
 	if (write_ret != (ssize_t)block_size) { /* conversion is safe because block_size is always small */
 		/* LCOV_EXCL_START */
 		if (errno == ENOSPC) {
@@ -485,23 +470,9 @@ int parity_read(struct snapraid_parity_handle* parity, block_off_t pos, unsigned
 		return -1;
 	}
 
-#if !HAVE_PREAD
-	if (lseek(parity->f, offset, SEEK_SET) != offset) {
-		/* LCOV_EXCL_START */
-		out("Error seeking file '%s' at offset %" PRIu64 ". %s.\n", parity->path, offset, strerror(errno));
-		return -1;
-		/* LCOV_EXCL_STOP */
-	}
-#endif
-
 	count = 0;
 	do {
-
-#if HAVE_PREAD
 		read_ret = pread(parity->f, block_buffer + count, block_size - count, offset + count);
-#else
-		read_ret = read(parity->f, block_buffer + count, block_size - count);
-#endif
 		if (read_ret < 0) {
 			/* LCOV_EXCL_START */
 			out("Error reading file '%s' at offset %" PRIu64 " for size %u. %s.\n", parity->path, offset + count, block_size - count, strerror(errno));
diff --git a/configure.ac b/configure.ac
index 03244d1b..b5adb42f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -82,7 +82,7 @@ dnl Checks for library functions.
 AC_CHECK_FUNCS([memset strchr strerror strrchr mkdir gettimeofday strtoul])
 AC_CHECK_FUNCS([getopt getopt_long snprintf vsnprintf sigaction])
 AC_CHECK_FUNCS([ftruncate fallocate fsync access posix_fallocate posix_fadvise])
-AC_CHECK_FUNCS([pread pwrite getc_unlocked ferror_unlocked fnmatch])
+AC_CHECK_FUNCS([getc_unlocked ferror_unlocked fnmatch])
 AC_CHECK_FUNCS([futimes futimens futimesat localtime_r])
 AC_CHECK_FUNCS([fstatat flock statfs])
 AC_CHECK_FUNCS([mach_absolute_time])