diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 07c1c927..89dd6b4a 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -52,7 +52,7 @@ jobs:
         cd g2c
         mkdir build
         cd build
-        cmake -DJasper_ROOT=~/Jasper -DENABLE_DOCS=On -DENABLE_OpenJPEG=ON -DCMAKE_C_FLAGS="-g -fprofile-abs-path -fprofile-arcs -ftest-coverage -O0 -fsanitize=address -Wall -Werror" ..
+        cmake -DJasper_ROOT=~/Jasper -DLOGGING=On -DENABLE_DOCS=On -DENABLE_OpenJPEG=ON -DCMAKE_C_FLAGS="-g -fprofile-abs-path -fprofile-arcs -ftest-coverage -O0 -fsanitize=address -Wall -Werror" ..
         make -j2
 
     - name: test
diff --git a/src/pngunpack.c b/src/pngunpack.c
index 4d5c4568..991a959e 100644
--- a/src/pngunpack.c
+++ b/src/pngunpack.c
@@ -39,13 +39,13 @@ pngunpack_int(unsigned char *cpack, g2int len, g2int *idrstmpl, g2int ndpts,
     float *ffld = fld;
     double *dfld = fld;
 
-    LOG(("pngunpack_int len %ld ndpts %ld fld_is_double %d", len, ndpts, fld_is_double));
+    LOG((2, "pngunpack_int len %ld ndpts %ld fld_is_double %d", len, ndpts, fld_is_double));
 
     rdieee(idrstmpl, &ref, 1);
     bscale = int_power(2.0, idrstmpl[1]);
     dscale = int_power(10.0, -idrstmpl[2]);
     nbits = idrstmpl[3];
-    LOG(("bscale %g dscale %g nbits %ld", bscale, dscale, nbits));
+    LOG((2, "bscale %g dscale %g nbits %ld", bscale, dscale, nbits));
     
     /* If nbits equals 0, we have a constant field where the reference
      * value is the data value at each gridpoint. */