diff --git a/FindPIP.cmake b/FindPIP.cmake
index e6d835ac..2d1435b1 100644
--- a/FindPIP.cmake
+++ b/FindPIP.cmake
@@ -30,7 +30,7 @@ if(NOT PIP_VERSION)
 	file(STRINGS "${PIP_INCLUDES}/pip_version_str.h" _VERSION REGEX "\".*\"")
 	string(REGEX MATCH "\".*\"" _VERSION ${_VERSION})
 	string(LENGTH ${_VERSION} SL)
-	math(EXPR SL '${SL}-2')
+	math(EXPR SL ${SL}-2)
 	string(SUBSTRING ${_VERSION} 1 ${SL} _VERSION)
 	set(PIP_VERSION ${_VERSION} CACHE STRING "VERSION")
 	if (NOT _PIP_MSG)
diff --git a/src_main/core/pibytearray.h b/src_main/core/pibytearray.h
index 41f18b13..f706b4ec 100755
--- a/src_main/core/pibytearray.h
+++ b/src_main/core/pibytearray.h
@@ -60,7 +60,10 @@ public:
 	PIByteArray(const uint size) {resize(size);}
 
 	//! Constructs byte array from data "data" and size "size"
-	PIByteArray(const void * data, const uint size): PIDeque<uchar>((const uchar*)data, size_t(size)) {/*for (uint i = 0; i < size; ++i) push_back(((uchar * )data)[i]);*/}
+	PIByteArray(const void * data, const uint size): PIDeque<uchar>((const uchar*)data, size_t(size)) {}
+
+	//! Constructs byte array with size "size" filled by "t"
+	PIByteArray(const uint size, uchar t): PIDeque<uchar>(size, t) {}
 
 
 	//! Help struct to store/restore custom blocks of data to/from PIByteArray