diff --git a/libavcodec/cllc.c b/libavcodec/cllc.c
index aca4669fcb..a65689ab56 100644
--- a/libavcodec/cllc.c
+++ b/libavcodec/cllc.c
@@ -225,7 +225,7 @@ static int cllc_decode_frame(AVCodecContext *avctx, void *data,
 
         break;
     default:
-        av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d\n.", coding_type);
+        av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type);
         return AVERROR_INVALIDDATA;
     }
 
diff --git a/libavfilter/vf_libopencv.c b/libavfilter/vf_libopencv.c
index e60caf2bc3..ea6ebe1b16 100644
--- a/libavfilter/vf_libopencv.c
+++ b/libavfilter/vf_libopencv.c
@@ -106,7 +106,7 @@ static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
     else if (!strcmp(type_str, "gaussian"     )) smooth->type = CV_GAUSSIAN;
     else if (!strcmp(type_str, "bilateral"    )) smooth->type = CV_BILATERAL;
     else {
-        av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown\n.", type_str);
+        av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown.\n", type_str);
         return AVERROR(EINVAL);
     }
 
@@ -220,7 +220,7 @@ static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
             return ret;
     } else {
         av_log(log_ctx, AV_LOG_ERROR,
-               "Shape unspecified or type '%s' unknown\n.", shape_str);
+               "Shape unspecified or type '%s' unknown.\n", shape_str);
         return AVERROR(EINVAL);
     }