diff --git a/src/mesa/shader/shader_api.c b/src/mesa/shader/shader_api.c
index 5e87bb4..f2813fc 100644
--- a/src/mesa/shader/shader_api.c
+++ b/src/mesa/shader/shader_api.c
@@ -1206,6 +1206,11 @@ get_uniform_rows_cols(const struct gl_program_parameter *p,
          *rows = 1;
          *cols = p->Size;
       }
+      else if (p->DataType == GL_FLOAT) {
+         /* probably an array of floats (this case is a hack, see bug 29823) */
+         *rows = p->Size / 4;
+         *cols = 1;
+      }
       else {
          *rows = p->Size / 4 + 1;
          if (p->Size % 4 == 0)