diff --git a/conf/boards/lisa_m_1.0.makefile b/conf/boards/lisa_m_1.0.makefile
index 7fe5ba466e..ecf0dc493c 100644
--- a/conf/boards/lisa_m_1.0.makefile
+++ b/conf/boards/lisa_m_1.0.makefile
@@ -90,8 +90,8 @@ ADC_IR2      = 2
 ADC_IR2_CHAN = 1
 endif
 ifndef ADC_IR3
-ADC_IR_TOP      = 4
-ADC_IR_TOP_CHAN = 3
+ADC_IR_TOP      = 3
+ADC_IR_TOP_CHAN = 2
 endif
 ifndef ADC_IR_NB_SAMPLES
 ADC_IR_NB_SAMPLES = 16
diff --git a/conf/boards/lisa_m_2.0.makefile b/conf/boards/lisa_m_2.0.makefile
index 6afbe0d536..6ee3e8aedc 100644
--- a/conf/boards/lisa_m_2.0.makefile
+++ b/conf/boards/lisa_m_2.0.makefile
@@ -94,8 +94,8 @@ ADC_IR2      = 2
 ADC_IR2_CHAN = 1
 endif
 ifndef ADC_IR3
-ADC_IR_TOP      = 4
-ADC_IR_TOP_CHAN = 3
+ADC_IR_TOP      = 3
+ADC_IR_TOP_CHAN = 2
 endif
 ifndef ADC_IR_NB_SAMPLES
 ADC_IR_NB_SAMPLES = 16