diff --git a/can/config.in b/can/config.in
index 2e4c76c..9c003c2 100644
--- a/can/config.in
+++ b/can/config.in
@@ -1,78 +1,80 @@
 dep_bool_menu "CAN bus support" CAN_SUPPORT y
 
-bool 'Use MCU builtin SPI support' SPI_HARDWARE
+if [ "$CAN_SUPPORT" = "y" ]; then
+   bool 'Use MCU builtin SPI support' SPI_HARDWARE
 
-choice 'SPI Port'			\
-   "PORTA  0 \
-    PORTB  1 \
-    PORTC  2 \
-    PORTD  3" \
-   'PORTB' SPI_PORTIDX
+   choice 'SPI Port'			\
+      "PORTA  0 \
+       PORTB  1 \
+       PORTC  2 \
+       PORTD  3" \
+      'PORTB' SPI_PORTIDX
 
-choice 'Bit MOSI'			\
-   "Bit0 0 \
-    Bit1 1 \
-    Bit2 2 \
-    Bit3 3 \
-    Bit4 4 \
-    Bit5 5 \
-    Bit6 6 \
-    Bit7 7" \
-   'Bit5' SPI_PIN_MOSI
+   choice 'Bit MOSI'			\
+      "Bit0 0 \
+       Bit1 1 \
+       Bit2 2 \
+       Bit3 3 \
+       Bit4 4 \
+       Bit5 5 \
+       Bit6 6 \
+       Bit7 7" \
+      'Bit5' SPI_PIN_MOSI
 
-choice 'Bit MISO'			\
-   "Bit0 0 \
-    Bit1 1 \
-    Bit2 2 \
-    Bit3 3 \
-    Bit4 4 \
-    Bit5 5 \
-    Bit6 6 \
-    Bit7 7" \
-   'Bit6' SPI_PIN_MISO
+   choice 'Bit MISO'			\
+      "Bit0 0 \
+       Bit1 1 \
+       Bit2 2 \
+       Bit3 3 \
+       Bit4 4 \
+       Bit5 5 \
+       Bit6 6 \
+       Bit7 7" \
+      'Bit6' SPI_PIN_MISO
 
-choice 'Bit SCK'			\
-   "Bit0 0 \
-    Bit1 1 \
-    Bit2 2 \
-    Bit3 3 \
-    Bit4 4 \
-    Bit5 5 \
-    Bit6 6 \
-    Bit7 7" \
-   'Bit7' SPI_PIN_SCK
+   choice 'Bit SCK'			\
+      "Bit0 0 \
+       Bit1 1 \
+       Bit2 2 \
+       Bit3 3 \
+       Bit4 4 \
+       Bit5 5 \
+       Bit6 6 \
+       Bit7 7" \
+      'Bit7' SPI_PIN_SCK
 
-choice 'Bit SS'			\
-   "Bit0 0 \
-    Bit1 1 \
-    Bit2 2 \
-    Bit3 3 \
-    Bit4 4 \
-    Bit5 5 \
-    Bit6 6 \
-    Bit7 7" \
-   'Bit4' SPI_PIN_SS
+   choice 'Bit SS'			\
+      "Bit0 0 \
+       Bit1 1 \
+       Bit2 2 \
+       Bit3 3 \
+       Bit4 4 \
+       Bit5 5 \
+       Bit6 6 \
+       Bit7 7" \
+      'Bit4' SPI_PIN_SS
 
-dep_bool_menu "Use interrupt" CAN_INTERRUPT y
+   dep_bool_menu "Use interrupt" CAN_INTERRUPT y
 
-choice 'Interrupt Port'			\
-   "PINA  PINA \
-    PINB  PINB \
-    PINC  PINC \
-    PIND  PIND" \
-   'PIND' SPI_REG_PIN_MCP_INT
-
-choice 'Interrupt Bit'			\
-   "Bit0 0 \
-    Bit1 1 \
-    Bit2 2 \
-    Bit3 3 \
-    Bit4 4 \
-    Bit5 5 \
-    Bit6 6 \
-    Bit7 7" \
-   'Bit2' SPI_PIN_MCP_INT
-
-endmenu
+   if [ "$CAN_INTERRUPT" = "y" ]; then
+      choice 'Interrupt Port'			\
+         "PINA  PINA \
+          PINB  PINB \
+          PINC  PINC \
+          PIND  PIND" \
+         'PIND' SPI_REG_PIN_MCP_INT
 
+      choice 'Interrupt Bit'			\
+         "Bit0 0 \
+          Bit1 1 \
+          Bit2 2 \
+          Bit3 3 \
+          Bit4 4 \
+          Bit5 5 \
+          Bit6 6 \
+          Bit7 7" \
+         'Bit2' SPI_PIN_MCP_INT
+   fi
+   endmenu
+fi
 endmenu