diff --git a/aegisub/src/audio_player_portaudio.cpp b/aegisub/src/audio_player_portaudio.cpp
index e10663ce9..1db7ea6b2 100644
--- a/aegisub/src/audio_player_portaudio.cpp
+++ b/aegisub/src/audio_player_portaudio.cpp
@@ -78,7 +78,7 @@ PortAudioPlayer::PortAudioPlayer()
 	PaError err = Pa_Initialize();
 
 	if (err != paNoError)
-		throw PortAudioError(std::string("Failed opening PortAudio:") + Pa_GetErrorText(err), 0);
+		throw PortAudioError(std::string("Failed opening PortAudio: ") + Pa_GetErrorText(err), 0);
 
 	// Build a list of host API-specific devices we can use
 	// Some host APIs may not support all audio formats, so build a priority
diff --git a/aegisub/src/video_provider_ffmpegsource.cpp b/aegisub/src/video_provider_ffmpegsource.cpp
index ea53438e9..09ef040fe 100644
--- a/aegisub/src/video_provider_ffmpegsource.cpp
+++ b/aegisub/src/video_provider_ffmpegsource.cpp
@@ -242,7 +242,7 @@ const AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int n) {
 	// decode frame
 	const FFMS_Frame *SrcFrame = FFMS_GetFrame(VideoSource, FrameNumber, &ErrInfo);
 	if (SrcFrame == NULL) {
-		throw VideoDecodeError(std::string("Failed to retrieve frame:") +  ErrInfo.Buffer);
+		throw VideoDecodeError(std::string("Failed to retrieve frame: ") +  ErrInfo.Buffer);
 	}
 
 	CurFrame.SetTo(SrcFrame->Data[0], Width, Height, SrcFrame->Linesize[0]);