diff --git a/src/FFmpegReader.cpp b/src/FFmpegReader.cpp
index 2e938f35..7439db4d 100644
--- a/src/FFmpegReader.cpp
+++ b/src/FFmpegReader.cpp
@@ -415,7 +415,7 @@ void FFmpegReader::Open()
 					}
 					// Check if it is there and writable
 			#if defined(__linux__)
-					if( adapter_ptr != NULL && access( adapter_ptr, W_OK ) == -1 ) {
+					if( adapter_ptr != NULL && access( adapter_ptr, W_OK ) == 0 ) {
 			#elif defined(_WIN32)
 					if( adapter_ptr != NULL ) {
 			#elif defined(__APPLE__)
diff --git a/src/FFmpegWriter.cpp b/src/FFmpegWriter.cpp
index 14171894..41285314 100644
--- a/src/FFmpegWriter.cpp
+++ b/src/FFmpegWriter.cpp
@@ -1316,7 +1316,7 @@ void FFmpegWriter::open_video(AVFormatContext *oc, AVStream *st)
 			}
 // Check if it is there and writable
 	#if defined(__linux__)
-		if( adapter_ptr != NULL && access( adapter_ptr, W_OK ) == -1 ) {
+		if( adapter_ptr != NULL && access( adapter_ptr, W_OK ) == 0 ) {
 	#elif defined(_WIN32)
 		if( adapter_ptr != NULL ) {
 	#elif defined(__APPLE__)