diff --git a/keyboards/annepro2/c15/rules.mk b/keyboards/annepro2/c15/rules.mk
index e50ee99516b..082e010abe8 100644
--- a/keyboards/annepro2/c15/rules.mk
+++ b/keyboards/annepro2/c15/rules.mk
@@ -13,9 +13,9 @@ MCU = cortex-m0plus
 ARMV = 6
 USE_FPU = no
 MCU_FAMILY = HT32
-MCU_SERIES = HT32F523x2
+MCU_SERIES = HT32F523xx
 MCU_LDSCRIPT = HT32F52342_ANNEPRO2
-MCU_STARTUP = ht32f523x2
+MCU_STARTUP = ht32f523xx
 
 BOARD = ANNEPRO2
 
diff --git a/keyboards/annepro2/c18/rules.mk b/keyboards/annepro2/c18/rules.mk
index c63a90ace46..b0b844715fb 100644
--- a/keyboards/annepro2/c18/rules.mk
+++ b/keyboards/annepro2/c18/rules.mk
@@ -18,9 +18,9 @@ MCU = cortex-m0plus
 ARMV = 6
 USE_FPU = no
 MCU_FAMILY = HT32
-MCU_SERIES = HT32F523x2
+MCU_SERIES = HT32F523xx
 MCU_LDSCRIPT = HT32F52342_ANNEPRO2
-MCU_STARTUP = ht32f523x2
+MCU_STARTUP = ht32f523xx
 
 BOARD = ANNEPRO2_C18