diff --git a/src/editing/textures/PreviewCumul.h b/src/editing/textures/PreviewCumul.h
index fc69bc2..bf72b00 100644
--- a/src/editing/textures/PreviewCumul.h
+++ b/src/editing/textures/PreviewCumul.h
@@ -8,6 +8,9 @@ class BasePreview;
 class PreviewCumul : public PreviewRenderer
 {
 public:
+    explicit PreviewCumul(QObject *parent = 0):
+        PreviewRenderer(parent),textures(0){}
+
     void setTextures(TexturesDefinition* textures);
     void setLayer(int layer);
 
@@ -17,7 +20,7 @@ protected:
     virtual Color getColor2D(double x, double y, double scaling);
 
 private:
-    TexturesDefinition* textures = 0;
+    TexturesDefinition* textures;
     int layer;
 };
 
diff --git a/src/editing/textures/PreviewLayerCoverage.h b/src/editing/textures/PreviewLayerCoverage.h
index 67ce0be..351e48d 100644
--- a/src/editing/textures/PreviewLayerCoverage.h
+++ b/src/editing/textures/PreviewLayerCoverage.h
@@ -8,6 +8,9 @@ class BasePreview;
 class PreviewLayerCoverage : public PreviewRenderer
 {
 public:
+    explicit PreviewLayerCoverage(QObject *parent = 0):
+        PreviewRenderer(parent),textures(0){}
+
     void setTextures(TexturesDefinition* textures);
     void setLayer(int layer);
 
@@ -17,7 +20,7 @@ protected:
     virtual Color getColor2D(double x, double y, double scaling);
 
 private:
-    TexturesDefinition* textures = 0;
+    TexturesDefinition* textures;
     int layer;
 };
 
diff --git a/src/editing/textures/PreviewLayerLook.h b/src/editing/textures/PreviewLayerLook.h
index e9ed9f2..659a3ed 100644
--- a/src/editing/textures/PreviewLayerLook.h
+++ b/src/editing/textures/PreviewLayerLook.h
@@ -8,6 +8,9 @@ class BasePreview;
 class PreviewLayerLook : public PreviewRenderer
 {
 public:
+    explicit PreviewLayerLook(QObject *parent = 0):
+        PreviewRenderer(parent),textures(0){}
+
     void setTextures(TexturesDefinition* textures);
     void setLayer(int layer);
 
@@ -17,7 +20,7 @@ protected:
     virtual Color getColor2D(double x, double y, double scaling);
 
 private:
-    TexturesDefinition* textures = 0;
+    TexturesDefinition* textures;
     int layer;
 };