diff --git a/README.rst b/README.rst
index ba673d71b..e37643b7a 100644
--- a/README.rst
+++ b/README.rst
@@ -48,7 +48,7 @@ Finds…
 - ``btrfs`` support.
 - ...
 
-It runs and compiles under most Unices, including Linux, FreeBSD and Darwin.
+It runs and compiles under most Unices, including Linux, FreeBSD, Darwin and Solaris.
 The main target is Linux though, some optimisations might not be available
 elsewhere.
 
diff --git a/lib/formats/progressbar.c b/lib/formats/progressbar.c
index c61714dcc..74bde6f9a 100644
--- a/lib/formats/progressbar.c
+++ b/lib/formats/progressbar.c
@@ -33,6 +33,10 @@
 
 #include <sys/ioctl.h>
 
+#if defined(__sun)
+#include <sys/termios.h>
+#endif
+
 typedef struct RmFmtHandlerProgress {
     /* must be first */
     RmFmtHandler parent;
diff --git a/lib/formats/stats.c b/lib/formats/stats.c
index 246ab2131..22b940276 100644
--- a/lib/formats/stats.c
+++ b/lib/formats/stats.c
@@ -32,6 +32,10 @@
 
 #include <sys/ioctl.h>
 
+#if defined(__sun)
+#include <sys/termios.h>
+#endif
+
 #define ARROW \
     fprintf(out, "%s==>%s ", MAYBE_YELLOW(out, session), MAYBE_RESET(out, session));
 
diff --git a/lib/formats/summary.c b/lib/formats/summary.c
index 5424e6ca3..8908c85be 100644
--- a/lib/formats/summary.c
+++ b/lib/formats/summary.c
@@ -32,6 +32,10 @@
 
 #include <sys/ioctl.h>
 
+#if defined(__sun)
+#include <sys/termios.h>
+#endif
+
 typedef struct RmFmtHandlerSummary {
     /* must be first */
     RmFmtHandler parent;
diff --git a/lib/utilities.h b/lib/utilities.h
index 135be2ac9..7ceacf6e6 100644
--- a/lib/utilities.h
+++ b/lib/utilities.h
@@ -106,6 +106,8 @@ WARN_UNUSED_RESULT static inline int rm_sys_lstat(const char *path, RmStat *buf)
 static inline gdouble rm_sys_stat_mtime_float(RmStat *stat) {
 #if RM_IS_APPLE
     return (gdouble)stat->st_mtimespec.tv_sec + stat->st_mtimespec.tv_nsec / 1000000000.0;
+#elif defined(__sun) && !(!defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__))
+    return (gdouble)stat->st_mtim.__tv_sec + stat->st_mtim.__tv_nsec / 1000000000.0;
 #else
     return (gdouble)stat->st_mtim.tv_sec + stat->st_mtim.tv_nsec / 1000000000.0;
 #endif
diff --git a/src/rmlint.c b/src/rmlint.c
index 4da5ecbfe..101e05169 100644
--- a/src/rmlint.c
+++ b/src/rmlint.c
@@ -23,6 +23,10 @@
 *
 **/
 
+#if defined(__sun)
+#define _POSIX_C_SOURCE 200809L
+#endif
+
 #include <locale.h>
 #include <stdlib.h>
 #include <string.h>