diff --git a/CHANGES.txt b/CHANGES.txt
index d0857e10..ee35d1c4 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -4,6 +4,8 @@ Changes
 1.1.5 (TBD)
 ------------------
 
+- The pixel shift in reads from datasets opened using the OVERVIEW_LEVEL
+  option, reported in the user discussion group and #1932, has been fixed (#).
 - Extend the signature of merge's method function (#1933).
 - MemoryFile implementation has been improved so that it can support multi-part
   S3 downloads (#1926).
diff --git a/rasterio/_shim.pxd b/rasterio/_shim.pxd
index 4305f04e..f7858ddd 100644
--- a/rasterio/_shim.pxd
+++ b/rasterio/_shim.pxd
@@ -2,9 +2,9 @@ include "gdal.pxi"
 
 cdef GDALDatasetH open_dataset(object filename, int mode, object allowed_drivers, object open_options, object siblings) except NULL
 cdef int delete_nodata_value(GDALRasterBandH hBand) except 3
-cdef int io_band(GDALRasterBandH band, int mode, float xoff, float yoff, float width, float height, object data, int resampling=*) except -1
-cdef int io_multi_band(GDALDatasetH hds, int mode, float xoff, float yoff, float width, float height, object data, Py_ssize_t[:] indexes, int resampling=*) except -1
-cdef int io_multi_mask(GDALDatasetH hds, int mode, float xoff, float yoff, float width, float height, object data, Py_ssize_t[:] indexes, int resampling=*) except -1
+cdef int io_band(GDALRasterBandH band, int mode, double xoff, double yoff, double width, double height, object data, int resampling=*) except -1
+cdef int io_multi_band(GDALDatasetH hds, int mode, double xoff, double yoff, double width, double height, object data, Py_ssize_t[:] indexes, int resampling=*) except -1
+cdef int io_multi_mask(GDALDatasetH hds, int mode, double xoff, double yoff, double width, double height, object data, Py_ssize_t[:] indexes, int resampling=*) except -1
 cdef const char* osr_get_name(OGRSpatialReferenceH hSrs)
 cdef void osr_set_traditional_axis_mapping_strategy(OGRSpatialReferenceH hSrs)
 cdef void set_proj_search_path(object path)
diff --git a/rasterio/_shim1.pyx b/rasterio/_shim1.pyx
index 1b5de864..14e1e636 100644
--- a/rasterio/_shim1.pyx
+++ b/rasterio/_shim1.pyx
@@ -47,8 +47,8 @@ cdef int delete_nodata_value(GDALRasterBandH hBand) except 3:
 
 
 cdef int io_band(
-        GDALRasterBandH band, int mode, float x0, float y0,
-        float width, float height, object data, int resampling=0) except -1:
+        GDALRasterBandH band, int mode, double x0, double y0,
+        double width, double height, object data, int resampling=0) except -1:
     """Read or write a region of data for the band.
 
     Implicit are
@@ -83,8 +83,8 @@ cdef int io_band(
 
 
 cdef int io_multi_band(
-        GDALDatasetH hds, int mode, float x0, float y0, float width,
-        float height, object data, Py_ssize_t[:] indexes, int resampling=0) except -1:
+        GDALDatasetH hds, int mode, double x0, double y0, double width,
+        double height, object data, Py_ssize_t[:] indexes, int resampling=0) except -1:
     """Read or write a region of data for multiple bands.
 
     Implicit are
@@ -130,8 +130,8 @@ cdef int io_multi_band(
 
 
 cdef int io_multi_mask(
-        GDALDatasetH hds, int mode, float x0, float y0, float width,
-        float height, object data, Py_ssize_t[:] indexes, int resampling=0) except -1:
+        GDALDatasetH hds, int mode, double x0, double y0, double width,
+        double height, object data, Py_ssize_t[:] indexes, int resampling=0) except -1:
     """Read or write a region of data for multiple band masks.
 
     Implicit are
diff --git a/rasterio/shim_rasterioex.pxi b/rasterio/shim_rasterioex.pxi
index 82122783..ba3d7c71 100644
--- a/rasterio/shim_rasterioex.pxi
+++ b/rasterio/shim_rasterioex.pxi
@@ -33,8 +33,8 @@ cdef extern from "gdal.h" nogil:
     cdef CPLErr GDALDatasetRasterIOEx(GDALDatasetH hDS, GDALRWFlag eRWFlag, int nDSXOff, int nDSYOff, int nDSXSize, int nDSYSize, void *pBuffer, int nBXSize, int nBYSize, GDALDataType eBDataType, int nBandCount, int *panBandCount, GSpacing nPixelSpace, GSpacing nLineSpace, GSpacing nBandSpace, GDALRasterIOExtraArg *psExtraArg)
 
 
-cdef int io_band(GDALRasterBandH band, int mode, float x0, float y0,
-                 float width, float height, object data, int resampling=0) except -1:
+cdef int io_band(GDALRasterBandH band, int mode, double x0, double y0,
+                 double width, double height, object data, int resampling=0) except -1:
     """Read or write a region of data for the band.
 
     Implicit are
@@ -83,8 +83,8 @@ cdef int io_band(GDALRasterBandH band, int mode, float x0, float y0,
     return exc_wrap_int(retval)
 
 
-cdef int io_multi_band(GDALDatasetH hds, int mode, float x0, float y0,
-                       float width, float height, object data,
+cdef int io_multi_band(GDALDatasetH hds, int mode, double x0, double y0,
+                       double width, double height, object data,
                        Py_ssize_t[:] indexes, int resampling=0) except -1:
     """Read or write a region of data for multiple bands.
 
@@ -145,8 +145,8 @@ cdef int io_multi_band(GDALDatasetH hds, int mode, float x0, float y0,
         CPLFree(bandmap)
 
 
-cdef int io_multi_mask(GDALDatasetH hds, int mode, float x0, float y0,
-                       float width, float height, object data,
+cdef int io_multi_mask(GDALDatasetH hds, int mode, double x0, double y0,
+                       double width, double height, object data,
                        Py_ssize_t[:] indexes, int resampling=0) except -1:
     """Read or write a region of data for multiple band masks.
 
diff --git a/tests/test_rio_merge.py b/tests/test_rio_merge.py
index 2aac3ab3..7d8c6706 100644
--- a/tests/test_rio_merge.py
+++ b/tests/test_rio_merge.py
@@ -16,7 +16,7 @@ from rasterio.merge import merge
 from rasterio.rio.main import main_group
 from rasterio.transform import Affine
 
-from .conftest import requires_gdal22
+from .conftest import requires_gdal22, gdal_version
 
 
 # Fixture to create test datasets within temporary directory
@@ -478,6 +478,10 @@ def test_merge_tiny_res_bounds(tiffs):
         assert data[0, 1, 1] == 0
 
 
+@pytest.mark.xfail(
+    gdal_version.major == 1,
+    reason="GDAL versions < 2 do not support data read/write with float sizes and offsets",
+)
 def test_merge_rgb(tmpdir):
     """Get back original image"""
     outputname = str(tmpdir.join('merged.tif'))
@@ -501,6 +505,10 @@ def test_merge_tiny_intres(tiffs):
     merge(datasets, res=2)
 
 
+@pytest.mark.xfail(
+    gdal_version.major == 1,
+    reason="GDAL versions < 2 do not support data read/write with float sizes and offsets",
+)
 @pytest.mark.parametrize("precision", [[], ["--precision", "9"]])
 def test_merge_precision(tmpdir, precision):
     """See https://github.com/mapbox/rasterio/issues/1837"""