diff --git a/configure.ac b/configure.ac
index 69ae3d10b2..fe21ba7471 100644
--- a/configure.ac
+++ b/configure.ac
@@ -702,7 +702,7 @@ translit(dnm, m, l) AM_CONDITIONAL(USE_LIBPNG, true)
 AG_GST_CHECK_FEATURE(LIBPNG, [Portable Network Graphics library], png, [
   AG_GST_PKG_CHECK_MODULES(LIBPNG, libpng >= 1.2)
   if test $HAVE_LIBPNG = "yes"; then
-    PKG_CHECK_MODULES(LIBPNG, libpng >= 1.5.1, [
+    PKG_CHECK_MODULES(LIBPNG_1_5, libpng >= 1.5.1, [
         AC_DEFINE(HAVE_LIBPNG_1_5, 1, [Defined if libpng version is 1.5.1 or newer])
       ], [true])
   fi