diff --git a/qrenderdoc/Code/Interface/ShaderProcessingTool.cpp b/qrenderdoc/Code/Interface/ShaderProcessingTool.cpp
index 2011783a8..766b6c3f6 100644
--- a/qrenderdoc/Code/Interface/ShaderProcessingTool.cpp
+++ b/qrenderdoc/Code/Interface/ShaderProcessingTool.cpp
@@ -145,7 +145,7 @@ bytebuf ShaderProcessingTool::CompileShader(QWidget *window, rdcstr source, rdcs
                                             ShaderStage stage, rdcstr arguments) const
 {
   if(executable.isEmpty())
-    return "";
+    return bytebuf();
 
   QString input_file = QDir(QDir::tempPath()).absoluteFilePath(lit("shader_input"));
   QString output_file = QDir(QDir::tempPath()).absoluteFilePath(lit("shader_output"));
@@ -162,7 +162,7 @@ bytebuf ShaderProcessingTool::CompileShader(QWidget *window, rdcstr source, rdcs
         window, QApplication::translate("ShaderProcessingTool", "Error writing temp file"),
         QApplication::translate("ShaderProcessingTool", "Couldn't write temporary file %1.")
             .arg(input_file));
-    return "";
+    return bytebuf();
   }
 
   QString programArguments = arguments;
@@ -177,7 +177,7 @@ bytebuf ShaderProcessingTool::CompileShader(QWidget *window, rdcstr source, rdcs
         QApplication::translate(
             "ShaderProcessingTool",
             "Please use {input_file} in the tool arguments to specify the input file."));
-    return "";
+    return bytebuf();
   }
 
   bytebuf outputData;
diff --git a/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp b/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp
index a3e645c15..cbf8cc5f7 100644
--- a/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp
+++ b/renderdoc/driver/shaders/spirv/spirv_disassemble.cpp
@@ -4727,7 +4727,7 @@ void ParseSPIRV(uint32_t *spirv, size_t spirvLength, SPVModule &module)
                 else
                 {
                   RDCERR("Unexpected preamble line with OpModuleProcessed: %s",
-                         std::string(source.begin(), source.begin() + nextLine));
+                         std::string(source.begin(), source.begin() + nextLine).c_str());
                   break;
                 }