diff --git a/modules/cudabgsegm/src/mog2.cpp b/modules/cudabgsegm/src/mog2.cpp
index 47135a088b..719317014a 100644
--- a/modules/cudabgsegm/src/mog2.cpp
+++ b/modules/cudabgsegm/src/mog2.cpp
@@ -105,10 +105,21 @@ class MOG2Impl CV_FINAL : public cuda::BackgroundSubtractorMOG2
     void setVarInit(double varInit) CV_OVERRIDE { constantsHost_.varInit_ = (float)varInit; }
 
     double getVarMin() const CV_OVERRIDE { return constantsHost_.varMin_; }
-    void setVarMin(double varMin) CV_OVERRIDE { constantsHost_.varMin_ = ::fminf((float)varMin, constantsHost_.varMax_); }
-
+    void setVarMin(double varMin) CV_OVERRIDE {
+        if (nframes_ == 0) {
+            constantsHost_.varMin_ = (float)varMin;
+        } else {
+            constantsHost_.varMin_ = ::fminf((float)varMin, constantsHost_.varMax_);
+        }
+    }
     double getVarMax() const CV_OVERRIDE { return constantsHost_.varMax_; }
-    void setVarMax(double varMax) CV_OVERRIDE { constantsHost_.varMax_ = ::fmaxf(constantsHost_.varMin_, (float)varMax); }
+    void setVarMax(double varMax) CV_OVERRIDE { 
+        if (nframes_ == 0) {
+            constantsHost_.varMax_ = (float)varMax;     
+        } else {
+            constantsHost_.varMax_ = ::fmaxf(constantsHost_.varMin_, (float)varMax);
+        }
+    }
 
     double getComplexityReductionThreshold() const CV_OVERRIDE { return ct_; }
     void setComplexityReductionThreshold(double ct) CV_OVERRIDE { ct_ = (float)ct; }