diff --git a/polymer/eduke32/build/src/defs.c b/polymer/eduke32/build/src/defs.c
index 1d820dce4..9bd0c053f 100644
--- a/polymer/eduke32/build/src/defs.c
+++ b/polymer/eduke32/build/src/defs.c
@@ -275,7 +275,7 @@ static int32_t Defs_ImportTileFromTexture(char const * const fn, int32_t const t
 
 #ifdef USE_OPENGL
         if (istexture)
-            hicsetsubsttex(tile, 0, fn, alphacut, 1.0f, 1.0f, 1.0f, 1.0f, HICR_NOSAVE|HICR_NOCOMPRESS);
+            hicsetsubsttex(tile, 0, fn, (float)alphacut / 255.f, 1.0f, 1.0f, 1.0f, 1.0f, HICR_NOSAVE|HICR_NOCOMPRESS);
 #endif
 
         return 1;
@@ -292,7 +292,7 @@ static int32_t Defs_ImportTileFromTexture(char const * const fn, int32_t const t
 
 #ifdef USE_OPENGL
     if (istexture)
-        hicsetsubsttex(tile, 0, fn, alphacut, 1.0f, 1.0f, 1.0, 1.0, HICR_NOSAVE|HICR_NOCOMPRESS);
+        hicsetsubsttex(tile, 0, fn, (float) alphacut / 255.f, 1.0f, 1.0f, 1.0, 1.0, HICR_NOSAVE|HICR_NOCOMPRESS);
 #else
     UNREFERENCED_PARAMETER(istexture);
 #endif