diff --git a/libs/main/core/pistring.h b/libs/main/core/pistring.h
index b1c9d540..ad291508 100644
--- a/libs/main/core/pistring.h
+++ b/libs/main/core/pistring.h
@@ -785,9 +785,9 @@ inline PIString operator +(const char c, const PIString & f) {return PIChar(c) +
 inline PIString operator +(const PIString & f, const char c) {return f + PIChar(c);}
 
 
-int versionCompare(const PIString & v0, const PIString & v1, int components = 6);
+int PIP_EXPORT versionCompare(const PIString & v0, const PIString & v1, int components = 6);
 
-PIString versionNormalize(const PIString & v);
+PIString PIP_EXPORT versionNormalize(const PIString & v);
 
 
 
diff --git a/libs/main/math/pimathmatrix.h b/libs/main/math/pimathmatrix.h
index 676a4486..1f50bfab 100644
--- a/libs/main/math/pimathmatrix.h
+++ b/libs/main/math/pimathmatrix.h
@@ -347,7 +347,15 @@ public:
 	bool isValid() const {return !PIVector2D<Type>::isEmpty();}
 
 	_CMatrix & operator =(const PIVector<PIVector<Type> > & v) {*this = _CMatrix(v); return *this;}
-	bool operator ==(const _CMatrix & sm) const {PIMM_FOR_A(i) if (_V2D::mat[i] != sm.mat[i]) return false; return true;}
+	bool operator ==(const _CMatrix & sm) const {
+		if(_V2D::mat.size() != sm.mat.size())
+			return false;
+		PIMM_FOR_A(i) {
+			if (_V2D::mat[i] != sm.mat[i])
+				return false;
+		}
+		return true;
+	}
 	bool operator !=(const _CMatrix & sm) const {return !(*this == sm);}
 	void operator +=(const _CMatrix & sm) {PIMM_FOR_A(i) _V2D::mat[i] += sm.mat[i];}
 	void operator -=(const _CMatrix & sm) {PIMM_FOR_A(i) _V2D::mat[i] -= sm.mat[i];}
diff --git a/main.cpp b/main.cpp
index 3764b12d..709bbb77 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,6 +1,7 @@
 #include "pip.h"
 
 int main() {
+	versionCompare("","");
 	PICloudServer s("127.0.0.1:10101");
 	s.startThreadedRead();
 	piSleep(10);