diff --git a/targets/TARGET_NUVOTON/TARGET_M2354/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_M2354/i2c_api.c
index 65a9553adbf..0009905b025 100644
--- a/targets/TARGET_NUVOTON/TARGET_M2354/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M2354/i2c_api.c
@@ -441,13 +441,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -458,6 +458,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;
diff --git a/targets/TARGET_NUVOTON/TARGET_M251/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_M251/i2c_api.c
index b07e088742a..e0ea4152717 100644
--- a/targets/TARGET_NUVOTON/TARGET_M251/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M251/i2c_api.c
@@ -425,13 +425,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -442,6 +442,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;
diff --git a/targets/TARGET_NUVOTON/TARGET_M261/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_M261/i2c_api.c
index 16b5a445ecf..4e1752fd29c 100644
--- a/targets/TARGET_NUVOTON/TARGET_M261/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M261/i2c_api.c
@@ -430,13 +430,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -447,6 +447,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_M451/i2c_api.c
index d9de137fd10..452131c791c 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/i2c_api.c
@@ -448,14 +448,14 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL_STA_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
             }
         case 0xF8:  // Bus Released
             if (i2c_ctl & (I2C_CTL_STA_Msk | I2C_CTL_STO_Msk) == I2C_CTL_STO_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
@@ -472,8 +472,10 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
-    
+
     return err;
 }
 
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_M480/i2c_api.c
index 66dae37473f..8fa211e190b 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M480/i2c_api.c
@@ -432,13 +432,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -449,6 +449,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_NANO100/i2c_api.c
index bf26483d1e1..72aa9cda7a1 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/i2c_api.c
@@ -468,14 +468,14 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CON_START_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CON_START_Msk | I2C_CON_STOP_Msk)) == I2C_CON_STOP_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
@@ -492,8 +492,10 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
-    
+
     return err;
 }
 
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/i2c_api.c b/targets/TARGET_NUVOTON/TARGET_NUC472/i2c_api.c
index f9e2b96c567..e88835cc65e 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/i2c_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/i2c_api.c
@@ -465,14 +465,14 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL_STA_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
             }
         case 0xF8:  // Bus Released
             if (i2c_ctl & (I2C_CTL_STA_Msk | I2C_CTL_STO_Msk) == I2C_CTL_STO_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
@@ -489,8 +489,10 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
-    
+
     return err;
 }