diff --git a/Utilities/cmtar/append.c b/Utilities/cmtar/append.c
index 38e829451d..14c7362932 100644
--- a/Utilities/cmtar/append.c
+++ b/Utilities/cmtar/append.c
@@ -18,7 +18,9 @@
 #if defined(_WIN32) && !defined(__CYGWIN__)
 # include <libtar/compat.h>
 #else
-# include <sys/param.h>
+# ifdef HAVE_SYS_PARAM_H
+#  include <sys/param.h>
+# endif
 #endif
 #include <libtar/compat.h>
 #include <sys/types.h>
diff --git a/Utilities/cmtar/decode.c b/Utilities/cmtar/decode.c
index d6a48c5926..b183010174 100644
--- a/Utilities/cmtar/decode.c
+++ b/Utilities/cmtar/decode.c
@@ -17,7 +17,9 @@
 #if defined(_WIN32) && !defined(__CYGWIN__)
 # include <libtar/compat.h>
 #else
-# include <sys/param.h>
+# ifdef HAVE_SYS_PARAM_H
+#  include <sys/param.h>
+# endif
 #endif
 
 #ifndef WIN32
diff --git a/Utilities/cmtar/extract.c b/Utilities/cmtar/extract.c
index 925f621588..a584a8f24d 100644
--- a/Utilities/cmtar/extract.c
+++ b/Utilities/cmtar/extract.c
@@ -28,7 +28,9 @@
 # include <direct.h>
 #else
 # include <utime.h>
-# include <sys/param.h>
+# ifdef HAVE_SYS_PARAM_H
+#  include <sys/param.h>
+# endif
 #endif
 
 #ifdef STDC_HEADERS
diff --git a/Utilities/cmtar/libtar.c b/Utilities/cmtar/libtar.c
index b50934935d..0d031b7f8b 100644
--- a/Utilities/cmtar/libtar.c
+++ b/Utilities/cmtar/libtar.c
@@ -19,7 +19,9 @@
 #include <libtar/compat.h>
 #include <io.h>
 #else
-#include <sys/param.h>
+# ifdef HAVE_SYS_PARAM_H
+#  include <sys/param.h>
+# endif
 #endif
 
 #ifdef STDC_HEADERS
diff --git a/Utilities/cmtar/util.c b/Utilities/cmtar/util.c
index 31f7fc8788..0e23a051eb 100644
--- a/Utilities/cmtar/util.c
+++ b/Utilities/cmtar/util.c
@@ -23,7 +23,9 @@
 #if defined(_WIN32) && !defined(__CYGWIN__)
 #include <direct.h>
 #else
-#include <sys/param.h>
+# ifdef HAVE_SYS_PARAM_H
+#  include <sys/param.h>
+# endif
 #endif
 
 /* hashing function for pathnames */
diff --git a/Utilities/cmtar/wrapper.c b/Utilities/cmtar/wrapper.c
index b194717f33..4f1271a459 100644
--- a/Utilities/cmtar/wrapper.c
+++ b/Utilities/cmtar/wrapper.c
@@ -17,7 +17,7 @@
 
 #include <libtar/compat.h>
 #if defined(HAVE_SYS_PARAM_H)
-#include <sys/param.h>
+# include <sys/param.h>
 #endif
 #if defined(HAVE_DIRENT_H)
 #include <dirent.h>