diff --git a/ui/shader.c b/ui/shader.c
index 9264009..1ffddbe 100644
--- a/ui/shader.c
+++ b/ui/shader.c
@@ -83,12 +83,12 @@
     glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
     if (!status) {
         glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length);
-        errmsg = malloc(length);
+        errmsg = g_malloc(length);
         glGetShaderInfoLog(shader, length, &length, errmsg);
         fprintf(stderr, "%s: compile %s error\n%s\n", __func__,
                 (type == GL_VERTEX_SHADER) ? "vertex" : "fragment",
                 errmsg);
-        free(errmsg);
+        g_free(errmsg);
         return 0;
     }
     return shader;
@@ -108,10 +108,10 @@
     glGetProgramiv(program, GL_LINK_STATUS, &status);
     if (!status) {
         glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
-        errmsg = malloc(length);
+        errmsg = g_malloc(length);
         glGetProgramInfoLog(program, length, &length, errmsg);
         fprintf(stderr, "%s: link program: %s\n", __func__, errmsg);
-        free(errmsg);
+        g_free(errmsg);
         return 0;
     }
     return program;