diff --git a/dump1090.c b/dump1090.c
index 7fa5327a3..9a8d73b2a 100644
--- a/dump1090.c
+++ b/dump1090.c
@@ -143,6 +143,7 @@ struct {
     int enable_agc;
     rtlsdr_dev_t *dev;
     int freq;
+    int ppm;
 
     /* Networking */
     char aneterr[ANET_ERR_LEN];
@@ -274,6 +275,7 @@ void modesInitConfig(void) {
     Modes.interactive_ttl = MODES_INTERACTIVE_TTL;
     Modes.aggressive = 0;
     Modes.interactive_rows = getTermRows();
+    Modes.ppm=0;
 }
 
 void modesInit(void) {
@@ -334,7 +336,6 @@ void modesInit(void) {
 void modesInitRTLSDR(void) {
     int j;
     int device_count;
-    int ppm_error = 0;
     char vendor[256], product[256], serial[256];
 
     device_count = rtlsdr_get_device_count();
@@ -374,7 +375,7 @@ void modesInitRTLSDR(void) {
     } else {
         fprintf(stderr, "Using automatic gain control.\n");
     }
-    rtlsdr_set_freq_correction(Modes.dev, ppm_error);
+    rtlsdr_set_freq_correction(Modes.dev, Modes.ppm);
     if (Modes.enable_agc) rtlsdr_set_agc_mode(Modes.dev, 1);
     rtlsdr_set_center_freq(Modes.dev, Modes.freq);
     rtlsdr_set_sample_rate(Modes.dev, MODES_DEFAULT_RATE);
@@ -2422,6 +2423,7 @@ void showHelp(void) {
 "--gain <db>              Set gain (default: max gain. Use -100 for auto-gain).\n"
 "--enable-agc             Enable the Automatic Gain Control (default: off).\n"
 "--freq <hz>              Set frequency (default: 1090 Mhz).\n"
+"--ppm <ppm>              Set ppm error (default: 0).\n"
 "--ifile <filename>       Read data from file (use '-' for stdin).\n"
 "--interactive            Interactive mode refreshing data on screen.\n"
 "--interactive-rows <num> Max number of rows in interactive mode (default: 15).\n"
@@ -2492,6 +2494,8 @@ int main(int argc, char **argv) {
             Modes.enable_agc++;
         } else if (!strcmp(argv[j],"--freq") && more) {
             Modes.freq = strtoll(argv[++j],NULL,10);
+        } else if (!strcmp(argv[j],"--ppm") && more) {
+            Modes.ppm = strtoll(argv[++j],NULL,10);
         } else if (!strcmp(argv[j],"--ifile") && more) {
             Modes.filename = strdup(argv[++j]);
         } else if (!strcmp(argv[j],"--no-fix")) {