diff --git a/programs/winemenubuilder/winemenubuilder.c b/programs/winemenubuilder/winemenubuilder.c
index 7a75d10..09402af 100644
--- a/programs/winemenubuilder/winemenubuilder.c
+++ b/programs/winemenubuilder/winemenubuilder.c
@@ -601,6 +601,7 @@ static int populate_module_icons(HMODULE hModule, GRPICONDIR *grpIconDir, ICONDI
 {
     int i;
     int validEntries = 0;
+    static const BYTE png_header[] = { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };

     for (i = 0; i < grpIconDir->idCount; i++)
     {
@@ -621,6 +622,12 @@ static int populate_module_icons(HMODULE hModule, GRPICONDIR *grpIconDir, ICONDI
                 }
                 if ((pIcon = LockResource(hResData)))
                 {
+                    BOOL isPNG = iconBytes >= sizeof(png_header) && memcmp(pIcon, png_header, sizeof(png_header)) == 0;
+                    if (isPNG)
+                    {
+                        WINE_FIXME("PNG icon not supported\n");
+                        continue;
+                    }
                     iconDirEntries[validEntries].bWidth = grpIconDir->idEntries[i].bWidth;
                     iconDirEntries[validEntries].bHeight = grpIconDir->idEntries[i].bHeight;
                     iconDirEntries[validEntries].bColorCount = grpIconDir->idEntries[i].bColorCount;