diff --git a/libfloppy/Makefile b/libfloppy/Makefile
index 215929a..f73f81b 100644
--- a/libfloppy/Makefile
+++ b/libfloppy/Makefile
@@ -9,7 +9,8 @@ CPPFLAGS = -I$(TOP)/../libmacos -DARCH_M68K
 
 LIBRARY = libfloppy.a
 
-SOURCES = floppy_read_sector.c floppy_close.c floppy_open.c
+SOURCES = floppy_read_sector.c floppy_close.c floppy_open.c \
+	  floppy_get_blocksize.c
 
 HEADERS = libfloppy.h
 
diff --git a/libfloppy/floppy_get_blocksize.c b/libfloppy/floppy_get_blocksize.c
new file mode 100644
index 0000000..c63aa8e
--- /dev/null
+++ b/libfloppy/floppy_get_blocksize.c
@@ -0,0 +1,6 @@
+#include "libfloppy.h"
+
+int floppy_get_blocksize(floppy_device_t *device)
+{
+	return SECTOR_SIZE;
+}
diff --git a/libfloppy/libfloppy.h b/libfloppy/libfloppy.h
index 4c8a97d..d506c04 100644
--- a/libfloppy/libfloppy.h
+++ b/libfloppy/libfloppy.h
@@ -21,4 +21,5 @@ typedef struct {
 extern floppy_device_t *floppy_open(int unit);
 extern int floppy_close(floppy_device_t* device);
 extern int floppy_read_sector(floppy_device_t *device,off_t offset, void* buffer, size_t size);
+extern int floppy_get_blocksize(floppy_device_t *device);
 #endif /* __LIBFLOPY_H__ */