diff --git a/scripts/src/formats.lua b/scripts/src/formats.lua
index 029b388675f..6bb3862a226 100644
--- a/scripts/src/formats.lua
+++ b/scripts/src/formats.lua
@@ -1598,10 +1598,10 @@ end
 
 --------------------------------------------------
 --
---@src/lib/formats/rc759_dsk.h,FORMATS["RC759"] = true
+--@src/lib/formats/rc759_dsk.h,FORMATS["RC759_DSK"] = true
 --------------------------------------------------
 
-if (FORMATS["APRIDISK"]~=null  or _OPTIONS["with-tools"]) then
+if opt_tool(FORMATS, "RC759_DSK") then
 	files {
 		MAME_DIR.. "src/lib/formats/rc759_dsk.cpp",
 		MAME_DIR.. "src/lib/formats/rc759_dsk.h",
diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 04685f458e2..190cfdd5410 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -1111,7 +1111,7 @@ FORMATS["PPG_DSK"] = true
 FORMATS["PRIMOPTP"] = true
 FORMATS["PYLDIN_DSK"] = true
 FORMATS["QL_DSK"] = true
-FORMATS["RC759"] = true
+FORMATS["RC759_DSK"] = true
 FORMATS["RK_CAS"] = true
 FORMATS["RX50_DSK"] = true
 FORMATS["SC3000_BIT"] = true
diff --git a/src/lib/formats/all.cpp b/src/lib/formats/all.cpp
index 247abd18e50..dbdc3be4d9b 100644
--- a/src/lib/formats/all.cpp
+++ b/src/lib/formats/all.cpp
@@ -516,6 +516,10 @@
 #include "ql_dsk.h"
 #endif
 
+#ifdef HAS_FORMATS_RC759_DSK
+#include "rc759_dsk.h"
+#endif
+
 #ifdef HAS_FORMATS_RK_CAS
 #include "rk_cas.h"
 #endif
@@ -1146,6 +1150,11 @@ void mame_formats_full_list(mame_formats_enumerator &en)
 	en.add(FLOPPY_PYLDIN_FORMAT); // pyldin_dsk.h
 #endif
 
+	en.category("Regnecentralen");
+#ifdef HAS_FORMATS_RC759_DSK
+	en.add(FLOPPY_RC759_FORMAT); // rc759_dsk.h
+#endif
+
 	en.category("DEC");
 #ifdef HAS_FORMATS_RX50_DSK
 	en.add(FLOPPY_RX50IMG_FORMAT); // rx50_dsk.h