--- a/src/dmresw.c	Thu Dec 08 15:56:36 2022 +0200
+++ b/src/dmresw.c	Thu Dec 08 15:59:22 2022 +0200
@@ -7,24 +7,24 @@
 #include "dmres.h"
 
 
-BOOL dmf_write_str(DMResource *fh, const void *data, const size_t len)
+bool dmf_write_str(DMResource *fh, const void *data, const size_t len)
 {
     return dmfwrite(data, len, 1, fh) == 1;
 }
 
 
-BOOL dmf_write_byte(DMResource *fh, const Uint8 val)
+bool dmf_write_byte(DMResource *fh, const Uint8 val)
 {
     return dmfputc(val, fh) == val;
 }
 
 
 #define DM_DEFINE_FFUNC(xname, xtype, xmacro)            \
-BOOL dmf_write_ ## xname (DMResource *f, const xtype v) {     \
+bool dmf_write_ ## xname (DMResource *f, const xtype v) {     \
     xtype result = DM_NATIVE_TO_ ## xmacro (v);         \
     if (dmfwrite(&result, sizeof( xtype ), 1, f) != 1)  \
-        return FALSE;                                   \
-    return TRUE;                                        \
+        return false;                                   \
+    return true;                                        \
 }
 
 #include "dmfiletmpl.h"