diff --git a/ui-opemu.cc b/ui-opemu.cc
index 6885502..fa13f79 100644
--- a/ui-opemu.cc
+++ b/ui-opemu.cc
@@ -8,6 +8,7 @@
 #include "ui-opemu.hh"
 #include "ui-profiling.hh"
 #include "ui-rendertarget.hh"
+#include "ui-utilities.hh"
 
 using namespace ops;
 using namespace ebcl;
@@ -666,7 +667,7 @@ void T_OpContext::run(
 			ensureStack( instr , 3 + ( instr.args[ 1 ] ? 1 : 0 ) );
 
 			const auto ss( stack.size( ) );
-			uint32_t texId = stack[ ss - 1 ].f ,
+			uint32_t texId = stack[ ss - 1 ].u ,
 				 unit = stack[ ss - 2 ].f ,
 				 level = stack[ ss - 3 ].f ,
 				 layer = ( instr.args[ 1 ] ? stack[ ss - 4 ].f : 0 );
@@ -685,7 +686,7 @@ void T_OpContext::run(
 			
 			glBindImageTexture( unit , texture.id( ) , level ,
 					instr.args[ 1 ] != 0 , layer ,
-					AccessModes_[ instr.args[ 0 ] ] ,
+					AccessModes_[ instr.args[ 0 ] - 1 ] ,
 					texture.internalFormat( ) );
 
 			stack.resize( ss - 3 - ( instr.args[ 1 ] ? 1 : 0 ) );