diff --git a/include/iglib.h b/include/iglib.h
index d799a59be..7d2a2d478 100644
--- a/include/iglib.h
+++ b/include/iglib.h
@@ -59,6 +59,9 @@ extern uint16_t DOSBOXID_VAR dosbox_id_baseio;
 #define DOSBOX_ID_REG_VERSION_STRING                    (0x00000002UL)
 #define DOSBOX_ID_REG_VERSION_NUMBER                    (0x00000003UL)
 #define DOSBOX_ID_REG_READ_EMTIME                       (0x00000004UL)
+#define DOSBOX_ID_REG_DOSBOX_VERSION_MAJOR              (0x00000005UL)
+#define DOSBOX_ID_REG_DOSBOX_VERSION_MINOR              (0x00000006UL)
+#define DOSBOX_ID_REG_DOSBOX_VERSION_SUB                (0x00000007UL)
 
 #define DOSBOX_ID_REG_DEBUG_OUT                         (0x0000DEB0UL)
 #define DOSBOX_ID_REG_DEBUG_CLEAR                       (0x0000DEB1UL)
diff --git a/src/ints/bios.cpp b/src/ints/bios.cpp
index 6ca8bc829..7f36101e1 100644
--- a/src/ints/bios.cpp
+++ b/src/ints/bios.cpp
@@ -718,19 +718,19 @@ void dosbox_integration_trigger_read() {
 		case DOSBOX_ID_REG_READ_EMTIME: /* current emulator time as 16.16 fixed point */
 			dosbox_int_register = (uint32_t)(PIC_FullIndex() * 0x10000);
 			break;
-		case 5: // DOSBox-X version number major (e.g. 2022)
+		case DOSBOX_ID_REG_DOSBOX_VERSION_MAJOR: // DOSBox-X version number major (e.g. 2022)
 			{
 				const char * ver = strchr(VERSION, '.');
 				dosbox_int_register = ver == NULL ? 0 : atoi(std::string(VERSION).substr(0, strlen(ver) - strlen(VERSION)).c_str());
 				break;
 			}
-		case 6: // DOSBox-X version number minor (e.g. 8)
+		case DOSBOX_ID_REG_DOSBOX_VERSION_MINOR: // DOSBox-X version number minor (e.g. 8)
 			{
 				const char * ver = strchr(VERSION, '.');
 				dosbox_int_register = ver == NULL ? 0 : atoi(ver + 1);
 				break;
 			}
-		case 7: // DOSBox-X version number sub (e.g. 0)
+		case DOSBOX_ID_REG_DOSBOX_VERSION_SUB: // DOSBox-X version number sub (e.g. 0)
 			{
 				const char * ver = strchr(VERSION, '.');
 				ver = strchr(ver + 1, '.');