diff --git a/src/gallium/auxiliary/nir/tgsi_to_nir.c b/src/gallium/auxiliary/nir/tgsi_to_nir.c
index a3bf9a848e9..9c5a1ad8af8 100644
--- a/src/gallium/auxiliary/nir/tgsi_to_nir.c
+++ b/src/gallium/auxiliary/nir/tgsi_to_nir.c
@@ -100,7 +100,7 @@ struct ttn_compile {
 #define ttn_channel(b, src, swiz) \
    nir_channel(b, src, TGSI_SWIZZLE_##swiz)
 
-gl_varying_slot
+static gl_varying_slot
 tgsi_varying_semantic_to_slot(unsigned semantic, unsigned index)
 {
    switch (semantic) {
diff --git a/src/gallium/auxiliary/nir/tgsi_to_nir.h b/src/gallium/auxiliary/nir/tgsi_to_nir.h
index 5d8b21dcd76..da765753b09 100644
--- a/src/gallium/auxiliary/nir/tgsi_to_nir.h
+++ b/src/gallium/auxiliary/nir/tgsi_to_nir.h
@@ -40,9 +40,6 @@ struct nir_shader *
 tgsi_to_nir_noscreen(const void *tgsi_tokens,
                      const nir_shader_compiler_options *options);
 
-gl_varying_slot
-tgsi_varying_semantic_to_slot(unsigned semantic, unsigned index);
-
 #ifdef __cplusplus
 }
 #endif