diff --git a/drivers/laplacian.h b/drivers/laplacian.h
index dc513a988908dc7ef5d9e91d9dfdf86a263771f7..c08ebbda77475ace26d195316f870a22a755f330 100644
--- a/drivers/laplacian.h
+++ b/drivers/laplacian.h
@@ -9,8 +9,8 @@
  * @date 2011-11-11
  *
  **/
-#ifndef _LAPLACIAN_H_
-#define _LAPLACIAN_H_
+#ifndef _laplacian_h_
+#define _laplacian_h_
 
 void z_spmLaplacian_7points( pastix_spm_t *spm, pastix_int_t dim1, pastix_int_t dim2, pastix_int_t dim3, pastix_fixdbl_t alpha, pastix_fixdbl_t beta );
 void c_spmLaplacian_7points( pastix_spm_t *spm, pastix_int_t dim1, pastix_int_t dim2, pastix_int_t dim3, pastix_fixdbl_t alpha, pastix_fixdbl_t beta );
@@ -30,4 +30,4 @@ void d_spmExtendedLaplacian3D( pastix_spm_t *spm, pastix_int_t dim1, pastix_int_
 void s_spmExtendedLaplacian3D( pastix_spm_t *spm, pastix_int_t dim1, pastix_int_t dim2, pastix_int_t dim3 );
 void p_spmExtendedLaplacian3D( pastix_spm_t *spm, pastix_int_t dim1, pastix_int_t dim2, pastix_int_t dim3 );
 
-#endif /* _LAPLACIAN_H_ */
+#endif /* _laplacian_h_ */
diff --git a/spm.h b/spm.h
index c0d18c0eaf69a893f48d5375eb5a97cb89f1c19f..145d5ce7f175db48f24c1f9c6d1f4a7c2cb775f8 100644
--- a/spm.h
+++ b/spm.h
@@ -24,8 +24,8 @@
  *   matrices, as well as norms computations and converter tools.
  *
  **/
-#ifndef _SPM_H_
-#define _SPM_H_
+#ifndef _spm_h_
+#define _spm_h_
 
 #include "pastix/api.h"
 
@@ -228,4 +228,4 @@ static inline void s_spmPrintElt( FILE *f, pastix_int_t i, pastix_int_t j, float
 /**
  * @}
  */
-#endif /* _SPM_H_ */
+#endif /* _spm_h_ */
diff --git a/spm_drivers.h b/spm_drivers.h
index c99509e489d6b855ca230991b482e902f6589dda..2a3cef11ba96a3a1e400cc2acd09a59805614330 100644
--- a/spm_drivers.h
+++ b/spm_drivers.h
@@ -13,8 +13,8 @@
  * @date 2011-11-11
  *
  **/
-#ifndef _SPM_DRIVER_H_
-#define _SPM_DRIVER_H_
+#ifndef _spm_drivers_h_
+#define _spm_drivers_h_
 
 #include "spm.h"
 
@@ -33,4 +33,4 @@ int readCSCD ( const char *filename, pastix_spm_t *spm, void **rhs, MPI_Comm pas
 int genLaplacian( const char *filename, pastix_spm_t *spm );
 int genExtendedLaplacian( const char *filename, pastix_spm_t *spm );
 
-#endif /* _SPM_DRIVER_H_ */
+#endif /* _spm_drivers_h_ */
diff --git a/z_spm.h b/z_spm.h
index e9f08d63491dff28038a145cb325a6a21afef4aa..b70bb2ff42dd09e9fede540fc02ad53fa715660c 100644
--- a/z_spm.h
+++ b/z_spm.h
@@ -17,8 +17,8 @@
  * @precisions normal z -> c d s p
  *
  **/
-#ifndef _z_spm_H_
-#define _z_spm_H_
+#ifndef _z_spm_h_
+#define _z_spm_h_
 
 /**
  * Integer routines
@@ -68,4 +68,4 @@ void          z_spmDofExtend(pastix_spm_t *spm);
 void          z_spmScal( const pastix_complex64_t alpha, pastix_spm_t *spm );
 
 
-#endif /* _z_spm_H_ */
+#endif /* _z_spm_h_ */