diff --git a/rigs/yaesu/ft600.c b/rigs/yaesu/ft600.c
index a941d9b4b..007f3aecc 100644
--- a/rigs/yaesu/ft600.c
+++ b/rigs/yaesu/ft600.c
@@ -87,18 +87,18 @@ enum ft600_native_cmd_e
  */
 typedef struct
 {
-    unsigned char band_no;
+//    unsigned char band_no;
     unsigned char freq[16];
-    unsigned char mode;
-    unsigned char ctcss;
-    unsigned char dcs;
-    unsigned char flag1;
-    unsigned char flag2;
-    unsigned char clarifier[2];
-    unsigned char not_used;
-    unsigned char step1;
-    unsigned char step2;
-    unsigned char filter;
+//    unsigned char mode;
+//    unsigned char ctcss;
+//    unsigned char dcs;
+//    unsigned char flag1;
+//    unsigned char flag2;
+//    unsigned char clarifier[2];
+//    unsigned char not_used;
+//    unsigned char step1;
+//    unsigned char step2;
+//    unsigned char filter;
 
 // cppcheck-suppress *
     unsigned char stuffing[16];
diff --git a/rotators/satel/satel.c b/rotators/satel/satel.c
index c0a846d1c..7d13c2b82 100644
--- a/rotators/satel/satel.c
+++ b/rotators/satel/satel.c
@@ -98,9 +98,9 @@ typedef struct satel_stat satel_stat_t;
 struct satel_stat
 {
     bool   motion_enabled;
-    int    mode;
-    time_t time;
-    int    absolute;
+//    int    mode;
+//    time_t time;
+//    int    absolute;
     int    az;
     int    el;
 };
diff --git a/simulators/simft736.c b/simulators/simft736.c
index 133b46c0d..49df48660 100644
--- a/simulators/simft736.c
+++ b/simulators/simft736.c
@@ -88,9 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
-    int n;
-
 
 again:
     int fd = openPort(argv[1]);
diff --git a/simulators/simft817.c b/simulators/simft817.c
index ee35af967..3688abe56 100644
--- a/simulators/simft817.c
+++ b/simulators/simft817.c
@@ -88,7 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
     int n;
 
 
diff --git a/simulators/simft847.c b/simulators/simft847.c
index 4551727a9..577b76ef6 100644
--- a/simulators/simft847.c
+++ b/simulators/simft847.c
@@ -88,7 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
     int n;
 
 
diff --git a/simulators/simft897.c b/simulators/simft897.c
index 4551727a9..577b76ef6 100644
--- a/simulators/simft897.c
+++ b/simulators/simft897.c
@@ -88,7 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
     int n;
 
 
diff --git a/simulators/simft990.c b/simulators/simft990.c
index 83450efe2..49341a0f3 100644
--- a/simulators/simft990.c
+++ b/simulators/simft990.c
@@ -145,8 +145,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     char buf[256];
-    char *pbuf;
-    int n;
     int fd = openPort(argv[1]);
 
     load_dat("simft990.dat", alldata);
diff --git a/simulators/simic7200.c b/simulators/simic7200.c
index 06205039c..8fcc33e4b 100644
--- a/simulators/simic7200.c
+++ b/simulators/simic7200.c
@@ -71,7 +71,7 @@ void dumphex(unsigned char *buf, int n)
 int
 frameGet(int fd, unsigned char *buf)
 {
-    int i = 0, n;
+    int i = 0;
     memset(buf, 0, BUFSIZE);
     unsigned char c;
 
diff --git a/simulators/simjupiter.c b/simulators/simjupiter.c
index dcf1bcabd..f4db185ac 100644
--- a/simulators/simjupiter.c
+++ b/simulators/simjupiter.c
@@ -88,9 +88,6 @@ int openPort(char *comport) // doesn't matter for using pts devices
 int main(int argc, char *argv[])
 {
     unsigned char buf[256];
-    unsigned char *pbuf;
-    int n;
-
 
 again:
     int fd = openPort(argv[1]);
diff --git a/src/cm108.c b/src/cm108.c
index 50587cad9..120a6ab23 100644
--- a/src/cm108.c
+++ b/src/cm108.c
@@ -295,8 +295,6 @@ int cm108_ptt_get(hamlib_port_t *p, ptt_t *pttx)
  */
 int cm108_dcd_get(hamlib_port_t *p, dcd_t *dcdx)
 {
-    int bytes;
-
     rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
 
     return RIG_OK;