diff --git a/doc/ggsn.8 b/doc/ggsn.8
index 3b9e903..62d467a 100644
--- a/doc/ggsn.8
+++ b/doc/ggsn.8
@@ -189,7 +189,7 @@ name resolution.
 .TP
 .BI --timelimit " seconds"
 Exit 
-.b ggsn
+.B ggsn
 after \fIseconds\fP. Used for debugging.
 
 
diff --git a/doc/sgsnemu.8 b/doc/sgsnemu.8
index 50502e0..af8f3ff 100644
--- a/doc/sgsnemu.8
+++ b/doc/sgsnemu.8
@@ -329,7 +329,7 @@ indicates infinite.
 .TP
 .BI --pingquiet
 Do not print information for each packet received (default = off). Is
-quite usefull for high pingrates.
+quite useful for high pingrates.
 
 
 .SH FILES
diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c
index f3d9ba0..a4d6461 100644
--- a/sgsnemu/sgsnemu.c
+++ b/sgsnemu/sgsnemu.c
@@ -592,7 +592,7 @@ int process_options(int argc, char **argv)
 		mcc = userloc_el[1];
 		printf("->mcc : %s\n", mcc);
 		if (strlen(mcc) != 3) {
-			printf("Invalid MCC lenght\n");
+			printf("Invalid MCC length\n");
 			return -1;
 		}
 
@@ -611,7 +611,7 @@ int process_options(int argc, char **argv)
 		a = (uint8_t) (mcc[2] - 48);
 
 		if ((strlen(mnc) > 3) || (strlen(mnc) < 2)) {
-			printf("Invalid MNC lenght\n");
+			printf("Invalid MNC length\n");
 			return -1;
 		}
 		if (strlen(mnc) == 2) {
@@ -676,7 +676,7 @@ int process_options(int argc, char **argv)
 		mcc = rai_el[0];
 		printf("->mcc : %s\n", mcc);
 		if (strlen(mcc) != 3) {
-			printf("Invalid MCC lenght\n");
+			printf("Invalid MCC length\n");
 			return -1;
 		}
 
@@ -692,7 +692,7 @@ int process_options(int argc, char **argv)
 		a = (uint8_t) (mcc[2] - 48);
 
 		if ((strlen(mnc) > 3) || (strlen(mnc) < 2)) {
-			printf("Invalid MNC lenght\n");
+			printf("Invalid MNC length\n");
 			return -1;
 		}
 		if (strlen(mnc) == 2) {