diff --git a/dlls/wined3d/arb_program_shader.c b/dlls/wined3d/arb_program_shader.c
index 81c30eb44b8..b026c15ebb7 100644
--- a/dlls/wined3d/arb_program_shader.c
+++ b/dlls/wined3d/arb_program_shader.c
@@ -4696,6 +4696,7 @@ static const SHADER_HANDLER shader_arb_instruction_handler_table[WINED3DSIH_TABL
     /* WINED3DSIH_EXP           */ shader_hw_scalar_op,
     /* WINED3DSIH_EXPP          */ shader_hw_scalar_op,
     /* WINED3DSIH_FRC           */ shader_hw_map2gl,
+    /* WINED3DSIH_IADD          */ NULL,
     /* WINED3DSIH_IF            */ NULL /* Hardcoded into the shader */,
     /* WINED3DSIH_IFC           */ shader_hw_ifc,
     /* WINED3DSIH_IGE           */ NULL,
diff --git a/dlls/wined3d/baseshader.c b/dlls/wined3d/baseshader.c
index 9636a5921fa..65283050223 100644
--- a/dlls/wined3d/baseshader.c
+++ b/dlls/wined3d/baseshader.c
@@ -63,6 +63,7 @@ static const char *shader_opcode_names[] =
     /* WINED3DSIH_EXP           */ "exp",
     /* WINED3DSIH_EXPP          */ "expp",
     /* WINED3DSIH_FRC           */ "frc",
+    /* WINED3DSIH_IADD          */ "iadd",
     /* WINED3DSIH_IF            */ "if",
     /* WINED3DSIH_IFC           */ "ifc",
     /* WINED3DSIH_IGE           */ "ige",
diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index c247ec27491..e8c05448c12 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -4738,6 +4738,7 @@ static const SHADER_HANDLER shader_glsl_instruction_handler_table[WINED3DSIH_TAB
     /* WINED3DSIH_EXP           */ shader_glsl_map2gl,
     /* WINED3DSIH_EXPP          */ shader_glsl_expp,
     /* WINED3DSIH_FRC           */ shader_glsl_map2gl,
+    /* WINED3DSIH_IADD          */ NULL,
     /* WINED3DSIH_IF            */ shader_glsl_if,
     /* WINED3DSIH_IFC           */ shader_glsl_ifc,
     /* WINED3DSIH_IGE           */ NULL,
diff --git a/dlls/wined3d/shader_sm4.c b/dlls/wined3d/shader_sm4.c
index 033ff02b29e..0327d800dcb 100644
--- a/dlls/wined3d/shader_sm4.c
+++ b/dlls/wined3d/shader_sm4.c
@@ -54,6 +54,7 @@ enum wined3d_sm4_opcode
     WINED3D_SM4_OP_DP4      = 0x11,
     WINED3D_SM4_OP_EMIT     = 0x13,
     WINED3D_SM4_OP_EXP      = 0x19,
+    WINED3D_SM4_OP_IADD     = 0x1e,
     WINED3D_SM4_OP_IGE      = 0x21,
     WINED3D_SM4_OP_LOG      = 0x2f,
     WINED3D_SM4_OP_MIN      = 0x33,
@@ -110,6 +111,7 @@ static const struct wined3d_sm4_opcode_info opcode_table[] =
     {WINED3D_SM4_OP_DP4,    WINED3DSIH_DP4,         1,  2},
     {WINED3D_SM4_OP_EMIT,   WINED3DSIH_EMIT,        0,  0},
     {WINED3D_SM4_OP_EXP,    WINED3DSIH_EXP,         1,  1},
+    {WINED3D_SM4_OP_IADD,   WINED3DSIH_IADD,        1,  2},
     {WINED3D_SM4_OP_IGE,    WINED3DSIH_IGE,         1,  2},
     {WINED3D_SM4_OP_LOG,    WINED3DSIH_LOG,         1,  1},
     {WINED3D_SM4_OP_MIN,    WINED3DSIH_MIN,         1,  2},
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 42aa2cc41e2..fb299c5ba00 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -428,6 +428,7 @@ enum WINED3D_SHADER_INSTRUCTION_HANDLER
     WINED3DSIH_EXP,
     WINED3DSIH_EXPP,
     WINED3DSIH_FRC,
+    WINED3DSIH_IADD,
     WINED3DSIH_IF,
     WINED3DSIH_IFC,
     WINED3DSIH_IGE,