diff --git a/src/basics/NoiseFunctionPerlin.h b/src/basics/NoiseFunctionPerlin.h
index 71c38d9..b80bf92 100644
--- a/src/basics/NoiseFunctionPerlin.h
+++ b/src/basics/NoiseFunctionPerlin.h
@@ -6,7 +6,7 @@
 namespace paysages {
 namespace basics {
 
-class NoiseFunctionPerlin {
+class BASICSSHARED_EXPORT NoiseFunctionPerlin {
   public:
     NoiseFunctionPerlin();
 };
diff --git a/src/basics/NoiseFunctionSimplex.h b/src/basics/NoiseFunctionSimplex.h
index 21316c7..7712983 100644
--- a/src/basics/NoiseFunctionSimplex.h
+++ b/src/basics/NoiseFunctionSimplex.h
@@ -8,7 +8,7 @@
 namespace paysages {
 namespace basics {
 
-class NoiseFunctionSimplex : public FractalNoise {
+class BASICSSHARED_EXPORT NoiseFunctionSimplex : public FractalNoise {
     virtual double getBase2d(double x, double y) const override;
     virtual double getBase3d(double x, double y, double z) const override;
 
diff --git a/src/system/Logs.h b/src/system/Logs.h
index 97c876c..641aeb2 100644
--- a/src/system/Logs.h
+++ b/src/system/Logs.h
@@ -11,7 +11,7 @@ namespace system {
 /**
  * Logger streams
  */
-class Logs {
+class SYSTEMSHARED_EXPORT Logs {
   public:
     static std::ostream &debug();
     static std::ostream &warning();