diff --git a/src/audio/wav_reader.c b/src/audio/wav_reader.c
index ce3339bae..18c284707 100644
--- a/src/audio/wav_reader.c
+++ b/src/audio/wav_reader.c
@@ -51,7 +51,7 @@ int read_wav_header(FILE *wav_file, struct wav_metadata *metadata)
 
         READ_N(buffer, 4);
         if(strncmp(buffer, "RIFF", 4) != 0) {
-                log_msg(LOG_LEVEL_ERROR, "[WAV] Expected RIFF chunk, %4s given.\n", buffer);
+                log_msg(LOG_LEVEL_ERROR, "[WAV] Expected RIFF chunk, %.4s given.\n", buffer);
                 return WAV_HDR_PARSE_WRONG_FORMAT;
         }
 
@@ -60,7 +60,7 @@ int read_wav_header(FILE *wav_file, struct wav_metadata *metadata)
 
         READ_N(buffer, 4);
         if (strncmp(buffer, "WAVE", 4) != 0) {
-                log_msg(LOG_LEVEL_ERROR, "[WAV] Expected WAVE chunk, %4s given.\n", buffer);
+                log_msg(LOG_LEVEL_ERROR, "[WAV] Expected WAVE chunk, %.4s given.\n", buffer);
                 return WAV_HDR_PARSE_WRONG_FORMAT;
         }
 
diff --git a/src/rtp/video_decoders.cpp b/src/rtp/video_decoders.cpp
index 1e93be616..da9db654e 100644
--- a/src/rtp/video_decoders.cpp
+++ b/src/rtp/video_decoders.cpp
@@ -1234,7 +1234,7 @@ bool parse_video_hdr(uint32_t *hdr, struct video_desc *desc)
         desc->height = ntohl(hdr[3]) & 0xffff;
         desc->color_spec = get_codec_from_fcc(hdr[4]);
         if(desc->color_spec == VIDEO_CODEC_NONE) {
-                log_msg(LOG_LEVEL_ERROR, "Unknown FourCC \"%4s\"!\n", (char *) &hdr[4]);
+                log_msg(LOG_LEVEL_ERROR, "Unknown FourCC \"%.4s\"!\n", (char *) &hdr[4]);
                 return false;
         }