diff --git a/include/assimp/material.h b/include/assimp/material.h
index 0634ec7c7..25cb3d6e0 100644
--- a/include/assimp/material.h
+++ b/include/assimp/material.h
@@ -631,9 +631,13 @@ struct aiMaterialProperty
 
 #ifdef __cplusplus
 
-	aiMaterialProperty()	{
-		mData = NULL;
-		mIndex = mSemantic = 0;
+	aiMaterialProperty()
+		: mSemantic( 0 )
+		, mIndex( 0 )
+		, mDataLength( 0 )
+		, mType( aiPTI_Float )
+		, mData( NULL )
+	{
 	}
 
 	~aiMaterialProperty()	{
diff --git a/include/assimp/mesh.h b/include/assimp/mesh.h
index 757299d72..449451632 100644
--- a/include/assimp/mesh.h
+++ b/include/assimp/mesh.h
@@ -382,6 +382,7 @@ struct aiAnimMesh
 		, mNormals()
 		, mTangents()
 		, mBitangents()
+		, mNumVertices( 0 )
 	{
 		// fixme consider moving this to the ctor initializer list as well
 		for( unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; a++){