diff --git a/ext/cog/cogframe.c b/ext/cog/cogframe.c
index 1116649bf0..8da9206e06 100644
--- a/ext/cog/cogframe.c
+++ b/ext/cog/cogframe.c
@@ -146,7 +146,7 @@ cog_frame_new_and_alloc_extended (CogMemoryDomain * domain,
   frame->components[2].v_shift = v_shift;
   frame->components[2].h_shift = h_shift;
 
-  frame->regions[0] = malloc (frame->components[0].length +
+  frame->regions[0] = g_malloc (frame->components[0].length +
       frame->components[1].length + frame->components[2].length);
 
   frame->components[0].data = COG_OFFSET (frame->regions[0],
diff --git a/ext/cog/cogvirtframe.c b/ext/cog/cogvirtframe.c
index f5dc1f6fad..f1faa8e5cc 100644
--- a/ext/cog/cogvirtframe.c
+++ b/ext/cog/cogvirtframe.c
@@ -52,7 +52,7 @@ cog_frame_new_virtual (CogMemoryDomain * domain, CogFrameFormat format,
     frame->components[0].h_shift = 0;
 
     frame->regions[0] =
-        malloc (frame->components[0].stride * COG_FRAME_CACHE_SIZE);
+        g_malloc (frame->components[0].stride * COG_FRAME_CACHE_SIZE);
     for (i = 0; i < COG_FRAME_CACHE_SIZE; i++) {
       frame->cached_lines[0][i] = 0;
     }
@@ -114,7 +114,7 @@ cog_frame_new_virtual (CogMemoryDomain * domain, CogFrameFormat format,
     CogFrameData *comp = &frame->components[i];
     int j;
 
-    frame->regions[i] = malloc (comp->stride * COG_FRAME_CACHE_SIZE);
+    frame->regions[i] = g_malloc (comp->stride * COG_FRAME_CACHE_SIZE);
     for (j = 0; j < COG_FRAME_CACHE_SIZE; j++) {
       frame->cached_lines[i][j] = 0;
     }