diff --git a/modules/core/include/opencv2/core/mat.hpp b/modules/core/include/opencv2/core/mat.hpp
index 92301cf3b..c19caf902 100644
--- a/modules/core/include/opencv2/core/mat.hpp
+++ b/modules/core/include/opencv2/core/mat.hpp
@@ -431,7 +431,7 @@ template<typename _Tp> inline _Tp* Mat::ptr(int y)
 
 template<typename _Tp> inline const _Tp* Mat::ptr(int y) const
 {
-    CV_DbgAssert( y == 0 || (data && dims >= 1 && data && (unsigned)y < (unsigned)size.p[0]) );
+    CV_DbgAssert( y == 0 || (data && dims >= 1 && (unsigned)y < (unsigned)size.p[0]) );
     return (const _Tp*)(data + step.p[0]*y);
 }
 
diff --git a/modules/core/src/matrix.cpp b/modules/core/src/matrix.cpp
index 11a4b0266..7560c2e59 100644
--- a/modules/core/src/matrix.cpp
+++ b/modules/core/src/matrix.cpp
@@ -184,7 +184,7 @@ static void finalizeHdr(Mat& m)
 void Mat::create(int d, const int* _sizes, int _type)
 {
     int i;
-    CV_Assert(0 <= d && _sizes && d <= CV_MAX_DIM && _sizes);
+    CV_Assert(0 <= d && d <= CV_MAX_DIM && _sizes);
     _type = CV_MAT_TYPE(_type);
 
     if( data && (d == dims || (d == 1 && dims <= 2)) && _type == type() )