diff --git a/autotests/read/pfm/comment_gray_half.phm b/autotests/read/pfm/comment_gray_half.phm
new file mode 100644
index 0000000..5597a00
Binary files /dev/null and b/autotests/read/pfm/comment_gray_half.phm differ
diff --git a/autotests/read/pfm/comment_gray_half.phm.json b/autotests/read/pfm/comment_gray_half.phm.json
new file mode 100644
index 0000000..05c6f45
--- /dev/null
+++ b/autotests/read/pfm/comment_gray_half.phm.json
@@ -0,0 +1,5 @@
+[
+    {
+        "fileName" : "testcard_gray_half.png"
+    }
+]
diff --git a/src/imageformats/pfm.cpp b/src/imageformats/pfm.cpp
index a04f9ed..e431b2c 100644
--- a/src/imageformats/pfm.cpp
+++ b/src/imageformats/pfm.cpp
@@ -144,7 +144,10 @@ public:
         } else {
             return false;
         }
-        auto wh = QString::fromLatin1(d->readLine(128));
+        QString wh;
+        do { // read line and skip comments
+            wh = QString::fromLatin1(d->readLine(128));
+        } while (wh.startsWith(QStringLiteral("#")));
         auto list = wh.split(QStringLiteral(" "));
         if (list.size() == 1) {
             m_ps = true; // try for Photoshop version