diff --git a/src/ca65/main.c b/src/ca65/main.c
index b25d5ad9f..49e7a1fb5 100644
--- a/src/ca65/main.c
+++ b/src/ca65/main.c
@@ -287,12 +287,6 @@ static void SetSys (const char* Sys)
             NewSymbol ("__GEOS_APPLE__", 1);
             break;
 
-        case TGT_GEOS_CBM:
-            /* Do not handle as a CBM system */
-            NewSymbol ("__GEOS__", 1);
-            NewSymbol ("__GEOS_CBM__", 1);
-            break;
-
         case TGT_LUNIX:
             NewSymbol ("__LUNIX__", 1);
             break;
diff --git a/src/cc65/main.c b/src/cc65/main.c
index c4a5c3788..d8b312fab 100644
--- a/src/cc65/main.c
+++ b/src/cc65/main.c
@@ -243,12 +243,6 @@ static void SetSys (const char* Sys)
             DefineNumericMacro ("__GEOS_APPLE__", 1);
             break;
 
-        case TGT_GEOS_CBM:
-            /* Do not handle as a CBM system */
-            DefineNumericMacro ("__GEOS__", 1);
-            DefineNumericMacro ("__GEOS_CBM__", 1);
-            break;
-
         case TGT_LUNIX:
             DefineNumericMacro ("__LUNIX__", 1);
             break;