diff --git a/tools/kiss_fastfir.c b/tools/kiss_fastfir.c
index a117865..62d57c4 100644
--- a/tools/kiss_fastfir.c
+++ b/tools/kiss_fastfir.c
@@ -149,7 +149,7 @@ kiss_fastfir_cfg kiss_fastfir_alloc(
     FFTFWD(st->fftcfg,st->tmpbuf,st->fir_freq_resp);
 
     /* TODO: this won't work for fixed point */
-    scale = 1.0 / st->nfft;
+    scale = 1.0f / st->nfft;
 
     for ( i=0; i < st->n_freq_bins; ++i ) {
 #ifdef USE_SIMD
diff --git a/tools/psdpng.c b/tools/psdpng.c
index cd6425f..3436032 100644
--- a/tools/psdpng.c
+++ b/tools/psdpng.c
@@ -103,7 +103,7 @@ void cpx2pixels(rgb_t * res,const float * fbuf,size_t n)
 
     fprintf(stderr,"min ==%f,max=%f\n",minval,maxval);
     valrange = maxval-minval;
-    if (valrange == 0) {
+    if (valrange == 0.0f) {
         fprintf(stderr,"min == max == %f\n",minval);
         exit (1);
     }
@@ -164,9 +164,9 @@ void transform_signal(void)
             avgctr=0;
             ++nrows;
             CHECKNULL( vals = (float*)realloc(vals,sizeof(float)*nrows*nfreqs) );
-            float eps = 1;
+            float eps = 1.0f;
             for (i=0;i<nfreqs;++i)
-                vals[(nrows - 1) * nfreqs + i] = 10 * log10 ( mag2buf[i] / navg + eps );
+                vals[(nrows - 1) * nfreqs + i] = 10.0f * log10f ( mag2buf[i] / navg + eps );
             memset(mag2buf,0,sizeof(mag2buf[0])*nfreqs);
         }
     }