diff --git a/include/rtree.h b/include/rtree.h
index ec2d30a806..cfb6c86d3c 100644
--- a/include/rtree.h
+++ b/include/rtree.h
@@ -1181,7 +1181,7 @@ int RTREE_QUAL::PickBranch( Rect* a_rect, Node* a_node )
     ELEMTYPEREAL    bestIncr = (ELEMTYPEREAL) -1;
     ELEMTYPEREAL    area;
     ELEMTYPEREAL    bestArea;
-    int             best;
+    int             best = 0;   // avoid compil complaint about uninitialized
     Rect            tempRect;
 
     for( int index = 0; index < a_node->m_count; ++index )
@@ -1374,7 +1374,7 @@ void RTREE_QUAL::ChoosePartition( PartitionVars* a_parVars, int a_minFill )
     ASSERT( a_parVars );
 
     ELEMTYPEREAL    biggestDiff;
-    int             group, chosen, betterGroup;
+    int             group, chosen=0, betterGroup=0;
 
     InitParVars( a_parVars, a_parVars->m_branchCount, a_minFill );
     PickSeeds( a_parVars );
@@ -1497,7 +1497,7 @@ void RTREE_QUAL::InitParVars( PartitionVars* a_parVars, int a_maxRects, int a_mi
 RTREE_TEMPLATE
 void RTREE_QUAL::PickSeeds( PartitionVars* a_parVars )
 {
-    int             seed0, seed1;
+    int             seed0 = 0, seed1 = 0;   // avoid compil complaint about uninitialized
     ELEMTYPEREAL    worst, waste;
     ELEMTYPEREAL    area[MAXNODES + 1];
 
diff --git a/pcbnew/github/github_plugin.cpp b/pcbnew/github/github_plugin.cpp
index 9650361ccd..dd521f5de1 100644
--- a/pcbnew/github/github_plugin.cpp
+++ b/pcbnew/github/github_plugin.cpp
@@ -42,6 +42,13 @@
     Possibly cache the zip file locally.  Use HTTP's "have changed" or whatever it is called.
 */
 
+
+#ifndef WIN32_LEAN_AND_MEAN
+// when WIN32_LEAN_AND_MEAN is defined, some useless includes in <window.h>
+// are skipped, and this avoid some compil issues
+#define WIN32_LEAN_AND_MEAN
+#endif
+
 #ifdef WIN32
  // defines needed by avhttp
  // Minimal Windows version is XP: Google for _WIN32_WINNT