diff --git a/src/CHANGES.md b/src/CHANGES.md
index ba0c5866..e0951253 100644
--- a/src/CHANGES.md
+++ b/src/CHANGES.md
@@ -2,6 +2,9 @@
 
 (starting from release version `0.5.66`)
 
+## 0.5.87
+* fix yield total correction as module (inverter input) value #570
+
 ## 0.5.86
 * prevent send devcontrol request during disabled night communication
 * changed yield total correction as module (inverter input) value #570
diff --git a/src/defines.h b/src/defines.h
index b070adf9..f94b4706 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -13,7 +13,7 @@
 //-------------------------------------
 #define VERSION_MAJOR       0
 #define VERSION_MINOR       5
-#define VERSION_PATCH       86
+#define VERSION_PATCH       87
 
 //-------------------------------------
 typedef struct {
diff --git a/src/hm/hmInverter.h b/src/hm/hmInverter.h
index 3369c5a8..ae3dc1a4 100644
--- a/src/hm/hmInverter.h
+++ b/src/hm/hmInverter.h
@@ -256,7 +256,7 @@ class Inverter {
                             // temperature is a signed value!
                             rec->record[pos] = (REC_TYP)((int16_t)val) / (REC_TYP)(div);
                         } else if (FLD_YT == rec->assign[pos].fieldId) {
-                            rec->record[pos] = ((REC_TYP)(val) / (REC_TYP)(div)) + ((REC_TYP)config->yieldCor[rec->assign[pos].ch]);
+                            rec->record[pos] = ((REC_TYP)(val) / (REC_TYP)(div)) + ((REC_TYP)config->yieldCor[rec->assign[pos].ch-1]);
                         } else {
                             if ((REC_TYP)(div) > 1)
                                 rec->record[pos] = (REC_TYP)(val) / (REC_TYP)(div);