diff --git a/src/modules/localip/localip.c b/src/modules/localip/localip.c
index e143fcf3f..4c98b1d6f 100644
--- a/src/modules/localip/localip.c
+++ b/src/modules/localip/localip.c
@@ -33,57 +33,70 @@ static void formatKey(const FFLocalIpOptions* options, FFLocalIpResult* ip, uint
     }
 }
 
-static void printIp(FFLocalIpResult* ip, bool markDefaultRoute)
+static void appendSpeed(FFLocalIpResult* ip, FFstrbuf* strbuf)
+{
+    if (ip->speed >= 1000000)
+    {
+        if (instance.config.display.fractionNdigits >= 0)
+            ffStrbufAppendF(strbuf, "%.*f Tbps", instance.config.display.fractionNdigits, ip->speed / 1000000.0);
+        else
+            ffStrbufAppendF(strbuf, "%g Tbps", ip->speed / 1000000.0);
+    }
+    else if (ip->speed >= 1000)
+    {
+        if (instance.config.display.fractionNdigits >= 0)
+            ffStrbufAppendF(strbuf, "%.*f Gbps", instance.config.display.fractionNdigits, ip->speed / 1000.0);
+        else
+            ffStrbufAppendF(strbuf, "%g Gbps", ip->speed / 1000.0);
+    }
+    else
+        ffStrbufAppendF(strbuf, "%u Mbps", (unsigned) ip->speed);
+}
+
+static void printIp(FFLocalIpResult* ip, bool markDefaultRoute, FFstrbuf* buffer)
 {
-    bool flag = false;
     if (ip->ipv4.length)
     {
-        ffStrbufWriteTo(&ip->ipv4, stdout);
-        flag = true;
+        ffStrbufAppend(buffer, &ip->ipv4);
     }
     if (ip->ipv6.length)
     {
-        if (flag) putchar(' ');
-        ffStrbufWriteTo(&ip->ipv6, stdout);
-        flag = true;
+        if (buffer->length) ffStrbufAppendC(buffer, ' ');
+        ffStrbufAppend(buffer, &ip->ipv6);
     }
     if (ip->mac.length)
     {
-        if (flag)
-            printf(" (%s)", ip->mac.chars);
+        if (buffer->length)
+            ffStrbufAppendF(buffer, " (%s)", ip->mac.chars);
         else
-            ffStrbufWriteTo(&ip->mac, stdout);
-        flag = true;
+            ffStrbufAppend(buffer, &ip->mac);
     }
     if (ip->mtu > 0 || ip->speed > 0)
     {
+        bool flag = buffer->length > 0;
         if (flag)
-            fputs(" [", stdout);
+            ffStrbufAppendS(buffer, " [");
         if (ip->speed > 0)
         {
-            if (ip->speed >= 1000000)
-                printf("%g Tbps", ip->speed / 1000000.0);
-            else if (ip->speed >= 1000)
-                printf("Speed %g Gbps", ip->speed / 1000.0);
-            else
-                printf("Speed %u Mbps", (unsigned) ip->speed);
-
             if (ip->mtu > 0)
-                fputs(" / ", stdout);
+                ffStrbufAppendS(buffer, "Speed ");
+            appendSpeed(ip, buffer);
+            if (ip->mtu > 0)
+                ffStrbufAppendS(buffer, " / MTU ");
         }
         if (ip->mtu > 0)
-            printf("MTU %u", (unsigned) ip->mtu);
-        putchar(']');
-        flag = true;
+            ffStrbufAppendF(buffer, "%u", (unsigned) ip->mtu);
+        if (flag)
+            ffStrbufAppendC(buffer, ']');
     }
-    if (ip->flags.length) {
-        if (flag) fputs(" <", stdout);
-        ffStrbufWriteTo(&ip->flags, stdout);
-        putchar('>');
-        flag = true;
+    if (ip->flags.length)
+    {
+        if (buffer->length) ffStrbufAppendS(buffer, " <");
+        ffStrbufAppend(buffer, &ip->flags);
+        ffStrbufAppendC(buffer, '>');
     }
-    if (markDefaultRoute && flag && ip->defaultRoute)
-        fputs(" *", stdout);
+    if (markDefaultRoute && ip->defaultRoute)
+        ffStrbufAppendS(buffer, " *");
 }
 
 void ffPrintLocalIp(FFLocalIpOptions* options)
@@ -106,21 +119,20 @@ void ffPrintLocalIp(FFLocalIpOptions* options)
 
     ffListSort(&results, (const void*) sortIps);
 
+    FF_STRBUF_AUTO_DESTROY buffer = ffStrbufCreate();
+
     if (options->showType & FF_LOCALIP_TYPE_COMPACT_BIT)
     {
         ffPrintLogoAndKey(FF_LOCALIP_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
 
-        bool flag = false;
-
         FF_LIST_FOR_EACH(FFLocalIpResult, ip, results)
         {
-            if (flag)
-                fputs(" - ", stdout);
-            else
-                flag = true;
-            printIp(ip, false);
+            if (buffer.length)
+                ffStrbufAppendS(&buffer, " - ");
+            printIp(ip, false, &buffer);
         }
-        putchar('\n');
+        ffStrbufPutTo(&buffer, stdout);
+        ffStrbufClear(&buffer);
     }
     else
     {
@@ -133,21 +145,13 @@ void ffPrintLocalIp(FFLocalIpOptions* options)
             if(options->moduleArgs.outputFormat.length == 0)
             {
                 ffPrintLogoAndKey(key.chars, 0, &options->moduleArgs, FF_PRINT_TYPE_NO_CUSTOM_KEY);
-                printIp(ip, !(options->showType & FF_LOCALIP_TYPE_DEFAULT_ROUTE_ONLY_BIT));
-                putchar('\n');
+                printIp(ip, !(options->showType & FF_LOCALIP_TYPE_DEFAULT_ROUTE_ONLY_BIT), &buffer);
+                ffStrbufPutTo(&buffer, stdout);
             }
             else
             {
-                FF_STRBUF_AUTO_DESTROY speedStr = ffStrbufCreate();
                 if (ip->speed > 0)
-                {
-                    if (ip->speed >= 1000000)
-                        ffStrbufSetF(&speedStr, "%g Tbps", ip->speed / 1000000.0);
-                    else if (ip->speed >= 1000)
-                        ffStrbufSetF(&speedStr, "%g Gbps", ip->speed / 1000.0);
-                    else
-                        ffStrbufSetF(&speedStr, "%u Mbps", (unsigned) ip->speed);
-                }
+                    appendSpeed(ip, &buffer);
                 FF_PRINT_FORMAT_CHECKED(key.chars, 0, &options->moduleArgs, FF_PRINT_TYPE_NO_CUSTOM_KEY, ((FFformatarg[]){
                     FF_FORMAT_ARG(ip->ipv4, "ipv4"),
                     FF_FORMAT_ARG(ip->ipv6, "ipv6"),
@@ -155,11 +159,12 @@ void ffPrintLocalIp(FFLocalIpOptions* options)
                     FF_FORMAT_ARG(ip->name, "ifname"),
                     FF_FORMAT_ARG(ip->defaultRoute, "is-default-route"),
                     FF_FORMAT_ARG(ip->mtu, "mtu"),
-                    FF_FORMAT_ARG(speedStr, "speed"),
+                    FF_FORMAT_ARG(buffer, "speed"),
                     FF_FORMAT_ARG(ip->flags, "flags"),
                 }));
             }
             ++index;
+            ffStrbufClear(&buffer);
         }
     }