diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6a472cb87513494dce5c3d1f6cbd0133d1d9df06..a72281a5f5007cf7192233b83239305de098e5a6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,7 +61,6 @@ INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
 
 
 SET(${PROJECT_NAME}_MATH_HEADERS
-  math/explog.hpp
   math/sincos.hpp
   )
 
@@ -79,6 +78,7 @@ SET(${PROJECT_NAME}_SPATIAL_HEADERS
   spatial/fwd.hpp
   spatial/skew.hpp
   spatial/act-on-set.hpp
+  spatial/explog.hpp
   )
 
 SET(${PROJECT_NAME}_MULTIBODY_JOINT_HEADERS
diff --git a/src/math/explog.hpp b/src/spatial/explog.hpp
similarity index 98%
rename from src/math/explog.hpp
rename to src/spatial/explog.hpp
index e99deca07653db776ffcffe4790b57732773e9b8..566d3b1e1f053a47dac496a63879d226b0815aa5 100644
--- a/src/math/explog.hpp
+++ b/src/spatial/explog.hpp
@@ -16,8 +16,8 @@
 // Pinocchio If not, see
 // <http://www.gnu.org/licenses/>.
 
-#ifndef __math_explog_hpp__
-# define __math_explog_hpp__
+#ifndef __spatial_explog_hpp__
+# define __spatial_explog_hpp__
 
 # include <Eigen/Geometry>