diff --git a/pkgs/development/php-packages/imagick/default.nix b/pkgs/development/php-packages/imagick/default.nix
index 504e15ae16d..8f9eed0c1c3 100644
--- a/pkgs/development/php-packages/imagick/default.nix
+++ b/pkgs/development/php-packages/imagick/default.nix
@@ -12,9 +12,14 @@ buildPecl {
       url = "https://github.com/Imagick/imagick/pull/336.patch";
       sha256 = "nuRdh02qaMx0s/5OzlfWjyYgZG1zgrYnAjsZ/UVIrUM=";
     })
+    # Fix detection of ImageMagick 7.
+    (fetchpatch {
+      url = "https://github.com/Imagick/imagick/commit/09551fbf38c16cdaf4ade7c08744501cd82d2747.patch";
+      sha256 = "qUeQHP08kKOzuQdEpR8RSZ18Yhi0U9z24KwQcAx1UVg=";
+    })
   ];
 
-  configureFlags = [ "--with-imagick=${pkgs.imagemagick.dev}" ];
+  configureFlags = [ "--with-imagick=${pkgs.imagemagick7.dev}" ];
   nativeBuildInputs = [ pkgs.pkgconfig ];
   buildInputs = [ pcre' ];