diff --git a/configure.ac b/configure.ac
index 7081445..4e938d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,7 +18,7 @@ AC_SUBST([LIBTOOL_DEPS])
 AC_PROG_CXX
 AC_LANG([C++])
 AC_C_BIGENDIAN
-AC_CHECK_HEADERS([stdint.h stddef.h])
+AC_CHECK_HEADERS([stdint.h stddef.h sys/mman.h])
 
 # Don't use AC_FUNC_MMAP, as it checks for mappings of already-mapped memory,
 # which we don't need (and does not exist on Windows).
diff --git a/snappy-stubs-internal.h b/snappy-stubs-internal.h
index 28019e4..5a96378 100644
--- a/snappy-stubs-internal.h
+++ b/snappy-stubs-internal.h
@@ -23,7 +23,10 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
+
+#ifdef HAVE_SYS_MMAN
 #include <sys/mman.h>
+#endif
 
 #include "config.h"
 #include "snappy-stubs-public.h"
diff --git a/snappy-test.h b/snappy-test.h
index 1bcc69a..48e2215 100644
--- a/snappy-test.h
+++ b/snappy-test.h
@@ -21,6 +21,11 @@
 
 #include <stdio.h>
 #include <stdarg.h>
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
 #include <sys/resource.h>
 #include <sys/time.h>