diff --git a/NEWS b/NEWS
index 8753ab57f6a..77d14f0538b 100644
--- a/NEWS
+++ b/NEWS
@@ -18,6 +18,10 @@ PHP                                                                        NEWS
   . Fixed bug #80901 (Info leak in ftp extension). (cmb)
   . Fixed bug #79100 (Wrong FTP error messages). (cmb)
 
+- GD:
+  . Fixed bug #81032 (GD install is affected by external libgd installation).
+    (Flavio Heleno, cmb)
+
 - MBString:
   . Fixed bug #81011 (mb_convert_encoding removes references from arrays). (cmb)
 
diff --git a/ext/gd/gd.c b/ext/gd/gd.c
index 3480699a70b..336a7396926 100644
--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -60,13 +60,23 @@
 
 static int le_gd, le_gd_font;
 
-#include <gd.h>
-#include <gd_errors.h>
-#include <gdfontt.h>  /* 1 Tiny font */
-#include <gdfonts.h>  /* 2 Small font */
-#include <gdfontmb.h> /* 3 Medium bold font */
-#include <gdfontl.h>  /* 4 Large font */
-#include <gdfontg.h>  /* 5 Giant font */
+#ifdef HAVE_GD_BUNDLED
+# include "libgd/gd.h"
+# include "libgd/gd_errors.h"
+# include "libgd/gdfontt.h"  /* 1 Tiny font */
+# include "libgd/gdfonts.h"  /* 2 Small font */
+# include "libgd/gdfontmb.h" /* 3 Medium bold font */
+# include "libgd/gdfontl.h"  /* 4 Large font */
+# include "libgd/gdfontg.h"  /* 5 Giant font */
+#else
+# include <gd.h>
+# include <gd_errors.h>
+# include <gdfontt.h>  /* 1 Tiny font */
+# include <gdfonts.h>  /* 2 Small font */
+# include <gdfontmb.h> /* 3 Medium bold font */
+# include <gdfontl.h>  /* 4 Large font */
+# include <gdfontg.h>  /* 5 Giant font */
+#endif
 
 #if defined(HAVE_GD_FREETYPE) && defined(HAVE_GD_BUNDLED)
 # include <ft2build.h>
diff --git a/ext/gd/libgd/gd_crop.c b/ext/gd/libgd/gd_crop.c
index b4bff270068..676545c4dbc 100644
--- a/ext/gd/libgd/gd_crop.c
+++ b/ext/gd/libgd/gd_crop.c
@@ -19,11 +19,12 @@
  *  (end code)
  **/
 
-#include <gd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
 
+#include "gd.h"
+
 static int gdGuessBackgroundColorFromCorners(gdImagePtr im, int *color);
 static int gdColorMatch(gdImagePtr im, int col1, int col2, float threshold);
 
diff --git a/ext/gd/libgd/gd_interpolation.c b/ext/gd/libgd/gd_interpolation.c
index 886b3b023ba..5247ad40a0b 100644
--- a/ext/gd/libgd/gd_interpolation.c
+++ b/ext/gd/libgd/gd_interpolation.c
@@ -58,7 +58,7 @@ TODO:
 #include <string.h>
 #include <math.h>
 
-#include <gd.h>
+#include "gd.h"
 #include "gdhelpers.h"
 
 #ifdef _MSC_VER
diff --git a/ext/gd/libgd/gd_wbmp.c b/ext/gd/libgd/gd_wbmp.c
index 13dc9e38d61..22d1c4f4c66 100644
--- a/ext/gd/libgd/gd_wbmp.c
+++ b/ext/gd/libgd/gd_wbmp.c
@@ -51,13 +51,13 @@
    ----------------------------------------------------------------------------
  */
 
-#include <gd.h>
-#include <gdfonts.h>
-#include <gd_errors.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <limits.h>
 
+#include "gd.h"
+#include "gdfonts.h"
+#include "gd_errors.h"
 #include "wbmp.h"