diff --git a/demod/mod/dfm09mod.c b/demod/mod/dfm09mod.c
index 07f0b5d..e8c9948 100644
--- a/demod/mod/dfm09mod.c
+++ b/demod/mod/dfm09mod.c
@@ -1707,7 +1707,7 @@ int main(int argc, char **argv) {
         int pos = 0;
         float _frmcnt = -1.0f;
 
-        memset(buffer_rawhex, BUFLEN+1, 0);
+        memset(buffer_rawhex, 0, BUFLEN+1);
 
         while ( (ch=fgetc(fp)) != EOF)
         {
diff --git a/demod/mod/m10mod.c b/demod/mod/m10mod.c
index b343ca6..e80af15 100644
--- a/demod/mod/m10mod.c
+++ b/demod/mod/m10mod.c
@@ -1522,7 +1522,7 @@ int main(int argc, char **argv) {
 
         while (1 > 0) {
 
-            memset(buffer_rawhex, 2*(FRAME_LEN+AUX_LEN)+12, 0);
+            memset(buffer_rawhex, 0, 2*(FRAME_LEN+AUX_LEN)+12);
             pbuf = fgets(buffer_rawhex, 2*(FRAME_LEN+AUX_LEN)+12, fp);
             if (pbuf == NULL) break;
             buffer_rawhex[2*(FRAME_LEN+AUX_LEN)] = '\0';
diff --git a/demod/mod/mXXmod.c b/demod/mod/mXXmod.c
index af3eaa3..072a7eb 100644
--- a/demod/mod/mXXmod.c
+++ b/demod/mod/mXXmod.c
@@ -1360,7 +1360,7 @@ int main(int argc, char **argv) {
 
         while (1 > 0) {
 
-            memset(buffer_rawhex, 2*(FRAME_LEN+AUX_LEN)+12, 0);
+            memset(buffer_rawhex, 0, 2*(FRAME_LEN+AUX_LEN)+12);
             pbuf = fgets(buffer_rawhex, 2*(FRAME_LEN+AUX_LEN)+12, fp);
             if (pbuf == NULL) break;
             buffer_rawhex[2*(FRAME_LEN+AUX_LEN)] = '\0';
diff --git a/demod/mod/meisei100mod.c b/demod/mod/meisei100mod.c
index d4264ee..0d73a42 100644
--- a/demod/mod/meisei100mod.c
+++ b/demod/mod/meisei100mod.c
@@ -702,7 +702,7 @@ int main(int argc, char **argv) {
                     if (!option2 && !option_raw) {
             jmpRS11:
                         if (reset_gpx) {
-                            memset(&gpx, sizeof(gpx), 0);
+                            memset(&gpx, 0, sizeof(gpx));
                             sn = -1;
                             freq = -1;
                             reset_gpx = 0;
@@ -867,7 +867,7 @@ int main(int argc, char **argv) {
                     else if (option2 && !option_raw) { // iMS-100
             jmpIMS:
                         if (reset_gpx) {
-                            memset(&gpx, sizeof(gpx), 0);
+                            memset(&gpx, 0, sizeof(gpx));
                             gpx.RH = NAN;
                             gpx.T = NAN;
                             sn = -1;