diff --git a/sysdeps/solaris/cpu.c b/sysdeps/solaris/cpu.c
index d35ff10c..5b34e3b9 100644
--- a/sysdeps/solaris/cpu.c
+++ b/sysdeps/solaris/cpu.c
@@ -28,6 +28,8 @@
 #include <assert.h>
 #include <sys/processor.h>
 
+#include <glibtop_private.h>
+
 static const unsigned long _glibtop_sysdeps_cpu =
 (1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +
 (1L << GLIBTOP_CPU_SYS) + (1L << GLIBTOP_CPU_IDLE) +
diff --git a/sysdeps/solaris/mem.c b/sysdeps/solaris/mem.c
index c712db06..ac21f0cb 100644
--- a/sysdeps/solaris/mem.c
+++ b/sysdeps/solaris/mem.c
@@ -27,6 +27,8 @@
 #include <assert.h>
 #include <unistd.h>
 
+#include <glibtop_private.h>
+
 static const unsigned long _glibtop_sysdeps_mem_os_sysconf =
 (1L << GLIBTOP_MEM_TOTAL);
 static const unsigned long _glibtop_sysdeps_mem_os_kstat =
diff --git a/sysdeps/solaris/open.c b/sysdeps/solaris/open.c
index e94ff5f7..845478fe 100644
--- a/sysdeps/solaris/open.c
+++ b/sysdeps/solaris/open.c
@@ -27,6 +27,8 @@
 #include <sys/types.h>
 #include <sys/processor.h>
 
+#include <glibtop_private.h>
+
 /* We need to call this when kstat_chain_update() returns new KID.
  * In that case all kstat pointers and data are invalid, so we
  * need to reread everything. The condition shouldn't happen very
diff --git a/sysdeps/solaris/procsignal.c b/sysdeps/solaris/procsignal.c
index 08afd184..aa51ee25 100644
--- a/sysdeps/solaris/procsignal.c
+++ b/sysdeps/solaris/procsignal.c
@@ -24,6 +24,8 @@
 #include <glibtop.h>
 #include <glibtop/procsignal.h>
 
+#include <glibtop_private.h>
+
 static const unsigned long _glibtop_sysdeps_proc_signal = 
 (1L << GLIBTOP_PROC_SIGNAL_SIGNAL) + (1L << GLIBTOP_PROC_SIGNAL_BLOCKED);
 
diff --git a/sysdeps/solaris/swap.c b/sysdeps/solaris/swap.c
index 9cf6a617..b2e4721d 100644
--- a/sysdeps/solaris/swap.c
+++ b/sysdeps/solaris/swap.c
@@ -28,6 +28,8 @@
 #include <assert.h>
 #include <sys/sysinfo.h>
 
+#include <glibtop_private.h>
+
 static const unsigned long _glibtop_sysdeps_swap =
 (1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
 (1L << GLIBTOP_SWAP_FREE);