diff --git a/drivers/iohb.h b/drivers/iohb.h
index 191659a62944862c397af0ceb27f59ca9f42c2b8..c067fd30c834bf6a99c19ae7b52538f8426b21f6 100644
--- a/drivers/iohb.h
+++ b/drivers/iohb.h
@@ -1,5 +1,5 @@
-#ifndef IOHB_H
-#define IOHB_H
+#ifndef _iohb_h_
+#define _iohb_h_
 
 int readHB_info(const char* filename, int* M, int* N, int* nz, char** Type,
                                                       int* Nrhs);
@@ -52,4 +52,4 @@ int ParseRfmt(char* fmt, int* perline, int* width, int* prec, char* flag);
 
 void IOHBTerminate(char* message);
 
-#endif
+#endif /* _iohb_h_ */
diff --git a/drivers/mmio.h b/drivers/mmio.h
index 28e40b02b7efadad66c38dc65de0b457d75e6d47..ad586f50334dadb2a4912abaf8fca7b922bcf7e6 100644
--- a/drivers/mmio.h
+++ b/drivers/mmio.h
@@ -6,8 +6,8 @@
 *
 */
 
-#ifndef MM_IO_H
-#define MM_IO_H
+#ifndef _mmio_h_
+#define _mmio_h_
 
 #define MM_MAX_LINE_LENGTH 1025
 #define MatrixMarketBanner "%%MatrixMarket"
@@ -126,6 +126,4 @@ int mm_read_mtx_crd_entry(FILE *f, int *Itab, int *Jtab, double *real, double *i
 int mm_read_unsymmetric_sparse(const char *fname, int *M_, int *N_, int *nz_,
                 double **val_, int **I_, int **J_);
 
-
-
-#endif
+#endif /* _mmio_h_ */