diff --git a/src/Extension/H264.cpp b/src/Extension/H264.cpp
index ec220ea7..b7bd1e29 100644
--- a/src/Extension/H264.cpp
+++ b/src/Extension/H264.cpp
@@ -238,22 +238,22 @@ public:
         _printer << "a=rtpmap:" << payload_type << " H264/" << 90000 << "\r\n";
         _printer << "a=fmtp:" << payload_type << " packetization-mode=1; profile-level-id=";
 
-        char strTemp[100];
+        char strTemp[1024];
         uint32_t profile_level_id = 0;
         if (strSPS.length() >= 4) { // sanity check
             profile_level_id = (uint8_t(strSPS[1]) << 16) |
                                (uint8_t(strSPS[2]) << 8) |
                                (uint8_t(strSPS[3])); // profile_idc|constraint_setN_flag|level_idc
         }
-        memset(strTemp, 0, 100);
+        memset(strTemp, 0, sizeof(strTemp));
         snprintf(strTemp, sizeof(strTemp), "%06X", profile_level_id);
         _printer << strTemp;
         _printer << "; sprop-parameter-sets=";
-        memset(strTemp, 0, 100);
-        av_base64_encode(strTemp, 100, (uint8_t *) strSPS.data(), (int) strSPS.size());
+        memset(strTemp, 0, sizeof(strTemp));
+        av_base64_encode(strTemp, sizeof(strTemp), (uint8_t *) strSPS.data(), (int) strSPS.size());
         _printer << strTemp << ",";
-        memset(strTemp, 0, 100);
-        av_base64_encode(strTemp, 100, (uint8_t *) strPPS.data(), (int) strPPS.size());
+        memset(strTemp, 0, sizeof(strTemp));
+        av_base64_encode(strTemp, sizeof(strTemp), (uint8_t *) strPPS.data(), (int) strPPS.size());
         _printer << strTemp << "\r\n";
         _printer << "a=control:trackID=" << (int) TrackVideo << "\r\n";
     }