diff --git a/src/hb-blob.c b/src/hb-blob.c
index 3c98052b9..37e778710 100644
--- a/src/hb-blob.c
+++ b/src/hb-blob.c
@@ -182,9 +182,9 @@ hb_blob_lock (hb_blob_t *blob)
 
   hb_mutex_lock (blob->lock);
 
-  if (HB_DEBUG_BLOB)
+  (void) (HB_DEBUG_BLOB &&
     fprintf (stderr, "%p %s (%d) -> %p\n", blob, __FUNCTION__,
-	     blob->lock_count, blob->data);
+	     blob->lock_count, blob->data));
 
   blob->lock_count++;
 
@@ -201,9 +201,9 @@ hb_blob_unlock (hb_blob_t *blob)
 
   hb_mutex_lock (blob->lock);
 
-  if (HB_DEBUG_BLOB)
+  (void) (HB_DEBUG_BLOB &&
     fprintf (stderr, "%p %s (%d) -> %p\n", blob, __FUNCTION__,
-	     blob->lock_count, blob->data);
+	     blob->lock_count, blob->data));
 
   assert (blob->lock_count > 0);
   blob->lock_count--;
@@ -245,30 +245,30 @@ _try_make_writable_inplace_unix_locked (hb_blob_t *blob)
 #endif
 
   if ((uintptr_t) -1L == pagesize) {
-    if (HB_DEBUG_BLOB)
-      fprintf (stderr, "%p %s: failed to get pagesize: %s\n", blob, __FUNCTION__, strerror (errno));
+    (void) (HB_DEBUG_BLOB &&
+      fprintf (stderr, "%p %s: failed to get pagesize: %s\n", blob, __FUNCTION__, strerror (errno)));
     return FALSE;
   }
-  if (HB_DEBUG_BLOB)
-    fprintf (stderr, "%p %s: pagesize is %lu\n", blob, __FUNCTION__, (unsigned long) pagesize);
+  (void) (HB_DEBUG_BLOB &&
+    fprintf (stderr, "%p %s: pagesize is %lu\n", blob, __FUNCTION__, (unsigned long) pagesize));
 
   mask = ~(pagesize-1);
   addr = (const char *) (((uintptr_t) blob->data) & mask);
   length = (const char *) (((uintptr_t) blob->data + blob->length + pagesize-1) & mask)  - addr;
-  if (HB_DEBUG_BLOB)
+  (void) (HB_DEBUG_BLOB &&
     fprintf (stderr, "%p %s: calling mprotect on [%p..%p] (%lu bytes)\n",
 	     blob, __FUNCTION__,
-	     addr, addr+length, (unsigned long) length);
+	     addr, addr+length, (unsigned long) length));
   if (-1 == mprotect ((void *) addr, length, PROT_READ | PROT_WRITE)) {
-    if (HB_DEBUG_BLOB)
-      fprintf (stderr, "%p %s: %s\n", blob, __FUNCTION__, strerror (errno));
+    (void) (HB_DEBUG_BLOB &&
+      fprintf (stderr, "%p %s: %s\n", blob, __FUNCTION__, strerror (errno)));
     return FALSE;
   }
 
-  if (HB_DEBUG_BLOB)
+  (void) (HB_DEBUG_BLOB &&
     fprintf (stderr, "%p %s: successfully made [%p..%p] (%lu bytes) writable\n",
 	     blob, __FUNCTION__,
-	     addr, addr+length, (unsigned long) length);
+	     addr, addr+length, (unsigned long) length));
   return TRUE;
 #else
   return FALSE;
@@ -278,16 +278,16 @@ _try_make_writable_inplace_unix_locked (hb_blob_t *blob)
 static void
 try_writable_inplace_locked (hb_blob_t *blob)
 {
-  if (HB_DEBUG_BLOB)
-    fprintf (stderr, "%p %s: making writable\n", blob, __FUNCTION__);
+  (void) (HB_DEBUG_BLOB &&
+    fprintf (stderr, "%p %s: making writable\n", blob, __FUNCTION__));
 
   if (_try_make_writable_inplace_unix_locked (blob)) {
-    if (HB_DEBUG_BLOB)
-      fprintf (stderr, "%p %s: making writable -> succeeded\n", blob, __FUNCTION__);
+    (void) (HB_DEBUG_BLOB &&
+      fprintf (stderr, "%p %s: making writable -> succeeded\n", blob, __FUNCTION__));
     blob->mode = HB_MEMORY_MODE_WRITABLE;
   } else {
-    if (HB_DEBUG_BLOB)
-      fprintf (stderr, "%p %s: making writable -> FAILED\n", blob, __FUNCTION__);
+    (void) (HB_DEBUG_BLOB &&
+      fprintf (stderr, "%p %s: making writable -> FAILED\n", blob, __FUNCTION__));
     /* Failed to make writable inplace, mark that */
     blob->mode = HB_MEMORY_MODE_READONLY;
   }
@@ -330,17 +330,17 @@ hb_blob_try_writable (hb_blob_t *blob)
   {
     char *new_data;
 
-    if (HB_DEBUG_BLOB)
+    (void) (HB_DEBUG_BLOB &&
       fprintf (stderr, "%p %s (%d) -> %p\n", blob, __FUNCTION__,
-	       blob->lock_count, blob->data);
+	       blob->lock_count, blob->data));
 
     if (blob->lock_count)
       goto done;
 
     new_data = malloc (blob->length);
     if (new_data) {
-      if (HB_DEBUG_BLOB)
-	fprintf (stderr, "%p %s: dupped successfully -> %p\n", blob, __FUNCTION__, blob->data);
+      (void) (HB_DEBUG_BLOB &&
+	fprintf (stderr, "%p %s: dupped successfully -> %p\n", blob, __FUNCTION__, blob->data));
       memcpy (new_data, blob->data, blob->length);
       _hb_blob_destroy_user_data (blob);
       blob->mode = HB_MEMORY_MODE_WRITABLE;