diff --git a/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp b/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp
index b583eaabf..540e91833 100644
--- a/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp
+++ b/renderdoc/driver/gl/wrappers/gl_shader_funcs.cpp
@@ -446,7 +446,7 @@ GLuint WrappedOpenGL::glCreateShaderProgramv(GLenum type, GLsizei count, const G
 		GetResourceManager()->AddLiveResource(id, res);
 
 		vector<string> src;
-		for(size_t i=0; i < count; i++)
+		for(GLsizei i=0; i < count; i++)
 			src.push_back(strings[i]);
 		
 		GLuint sepprog = MakeSeparableShaderProgram(m_Real, type, src, NULL);