diff --git a/keyboards/converter/ibm_5291/config.h b/keyboards/converter/ibm_5291/config.h
index 59ec04cfb478..ebb8c6e3bee5 100644
--- a/keyboards/converter/ibm_5291/config.h
+++ b/keyboards/converter/ibm_5291/config.h
@@ -25,13 +25,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MANUFACTURER        QMK
 #define PRODUCT             5291 keyboard converter
 
-#define MATRIX_ROWS         5
+#define MATRIX_ROWS         24
 #define MATRIX_COLS         4
 
-#define MATRIX_ROW_PINS   {B2, B3, B4, B5, B6}
-#define MATRIX_COL_PINS   {B0, B1}
-#define MATRIX_DATA_PIN   D0
-#define MATRIX_STROBE_PIN D1
+#define IBM_5291_MATRIX_ROW_PINS   {B2, B3, B4, B5, B6}
+#define IBM_5291_MATRIX_COL_PINS   {B0, B1}
+#define IBM_5291_MATRIX_DATA_PIN   D0
+#define IBM_5291_MATRIX_STROBE_PIN D1
 #define LED_PIN           D6
 
 
diff --git a/keyboards/converter/ibm_5291/matrix.c b/keyboards/converter/ibm_5291/matrix.c
index 3946d02e518d..8ee914eebaab 100644
--- a/keyboards/converter/ibm_5291/matrix.c
+++ b/keyboards/converter/ibm_5291/matrix.c
@@ -46,8 +46,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define NUM_ROW_PINS 5
 #define NUM_COL_PINS 2
 
-static const uint8_t row_pins [NUM_ROW_PINS] = MATRIX_ROW_PINS ;
-static const uint8_t col_pins [NUM_ROW_PINS] = MATRIX_COL_PINS ;
+static const uint8_t row_pins [NUM_ROW_PINS] = IBM_5291_MATRIX_ROW_PINS ;
+static const uint8_t col_pins [NUM_ROW_PINS] = IBM_5291_MATRIX_COL_PINS ;
 
 #if ( DEBOUNCE > 0 )
 static uint16_t debouncing_time         ;
@@ -78,7 +78,7 @@ void init_led(void) {
 static
 inline
 void init_data(void) {
-    uint8_t pin = MATRIX_DATA_PIN ;
+    uint8_t pin = IBM_5291_MATRIX_DATA_PIN ;
     _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
     _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // LO
 }
@@ -86,7 +86,7 @@ void init_data(void) {
 static
 inline
 void init_strobe(void) {
-    uint8_t pin = MATRIX_STROBE_PIN ;
+    uint8_t pin = IBM_5291_MATRIX_STROBE_PIN ;
     _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF);  // OUT
     _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF);  // HI
 }
@@ -142,8 +142,8 @@ void select_col(uint8_t current_col) {
 static
 inline
 uint8_t matrix_strobe(uint8_t col_index) {
-    uint8_t strobe_pin = MATRIX_STROBE_PIN ;
-    uint8_t data_pin   = MATRIX_DATA_PIN   ;
+    uint8_t strobe_pin = IBM_5291_MATRIX_STROBE_PIN ;
+    uint8_t data_pin   = IBM_5291_MATRIX_DATA_PIN   ;
     
     // set strobe pin low
     _SFR_IO8((strobe_pin >> 4) + 2) &=  ~_BV(strobe_pin & 0xF);
diff --git a/users/mmcm/mmcm.sh b/users/mmcm/mmcm.sh
index bba905adbf65..537160a5044d 100755
--- a/users/mmcm/mmcm.sh
+++ b/users/mmcm/mmcm.sh
@@ -90,4 +90,5 @@ make clueboard/2x1800/2019:mmcm SILENT=true &&
 make converter/memorex_2051 SILENT=true &&
 make keebio/bdn9/rev2:mmcm SILENT=true &&
 make converter/nec_pc_8801 SILENT=true &&
+make converter/ibm_5291 SILENT=true &&
 true