diff --git a/sw/airborne/peripherals/ami601.h b/sw/airborne/peripherals/ami601.h
index 38be9a347a..d6d9e58193 100644
--- a/sw/airborne/peripherals/ami601.h
+++ b/sw/airborne/peripherals/ami601.h
@@ -30,40 +30,42 @@ extern volatile uint32_t ami601_nb_err;
 #define AMI601_ISR()  {}
 
 #ifdef SITL
-#define AMI601Event(_handler) {			                                    \
-  if (ami601_status == AMI601_DATA_AVAILABLE)	                          \
-      _handler();				                                                \
+#define AMI601Event(_handler) {                 \
+    if (ami601_status == AMI601_DATA_AVAILABLE) \
+      _handler();                               \
   }
 #else
-#define AMI601Event(_handler) {						                              \
-  switch (ami601_status) {						                                  \
-    case AMI601_SENDING_REQ :						                                \
-      if ( ami601_i2c_trans.status == I2CTransSuccess ) {		            \
-	      ami601_status =  AMI601_WAITING_MEASURE;			                  \
-      }									                                                \
-      break;								                                            \
-    case AMI601_WAITING_MEASURE :                                       \
-      ami601_status =  AMI601_READING_MEASURE;		                      \
-      ami601_i2c_trans.type = I2CTransRx;					                      \
-      ami601_i2c_trans.len_r = 15;					                            \
-      i2c_submit(&i2c1, &ami601_i2c_trans);				                      \
-      break;                                                            \
-    case AMI601_READING_MEASURE :					                              \
-      if ( ami601_i2c_trans.status == I2CTransSuccess ) {		            \
-	      ami601_foo1 = ami601_i2c_trans.buf[0]; /* AA ?  */		          \
-	      ami601_foo2 = ami601_i2c_trans.buf[1]; /* 55 ?  */		          \
-	      ami601_foo3 = ami601_i2c_trans.buf[2]; /* ERR ? */		          \
-	      uint8_t i;							                                        \
-	      for (i=0; i< AMI601_NB_CHAN; i++) {				                      \
-	        ami601_values[i]  = ami601_i2c_trans.buf[3 + 2 * i];		      \
-	        ami601_values[i] += ami601_i2c_trans.buf[3 + 2 * i + 1] * 256;\
-	      }								                                                \
-	      ami601_status = AMI601_DATA_AVAILABLE;				                  \
-	      _handler();							                                        \
-      }									                                                \
-    break;								                                              \
-  }									                                                    \
-}
+#define AMI601Event(_handler) {                                         \
+    switch (ami601_status) {                                            \
+      case AMI601_SENDING_REQ :                                         \
+        if ( ami601_i2c_trans.status == I2CTransSuccess ) {             \
+	      ami601_status =  AMI601_WAITING_MEASURE;                      \
+        }                                                               \
+        break;                                                          \
+      case AMI601_WAITING_MEASURE :                                     \
+        ami601_status =  AMI601_READING_MEASURE;                        \
+        ami601_i2c_trans.type = I2CTransRx;                             \
+        ami601_i2c_trans.len_r = 15;                                    \
+        i2c_submit(&i2c1, &ami601_i2c_trans);                           \
+        break;                                                          \
+      case AMI601_READING_MEASURE :                                     \
+        if ( ami601_i2c_trans.status == I2CTransSuccess ) {             \
+	      ami601_foo1 = ami601_i2c_trans.buf[0]; /* AA ?  */            \
+	      ami601_foo2 = ami601_i2c_trans.buf[1]; /* 55 ?  */            \
+	      ami601_foo3 = ami601_i2c_trans.buf[2]; /* ERR ? */            \
+	      uint8_t i;                                                    \
+	      for (i=0; i< AMI601_NB_CHAN; i++) {                           \
+	        ami601_values[i]  = ami601_i2c_trans.buf[3 + 2 * i];        \
+	        ami601_values[i] += ami601_i2c_trans.buf[3 + 2 * i + 1] * 256; \
+	      }                                                             \
+	      ami601_status = AMI601_DATA_AVAILABLE;                        \
+	      _handler();                                                   \
+        }                                                               \
+        break;                                                          \
+      default:                                                          \
+        break;                                                          \
+    }                                                                   \
+  }
 #endif