diff --git a/fluidsynth/src/bindings/fluid_cmd.c b/fluidsynth/src/bindings/fluid_cmd.c
index 6b916ce3..85cb1b3c 100644
--- a/fluidsynth/src/bindings/fluid_cmd.c
+++ b/fluidsynth/src/bindings/fluid_cmd.c
@@ -823,7 +823,7 @@ fluid_handle_reverbsetlevel(fluid_synth_t* synth, int ac, char** av, fluid_ostre
     return -1;
   }
   level = atof(av[0]);
-  if (abs(level) > 30){
+  if (fabs(level) > 30){
     fluid_ostream_printf(out, "rev_setlevel: Value too high! (Value of 10 =+20 dB)\n");
     return 0;
   }
diff --git a/fluidsynth/src/midi/fluid_midi.c b/fluidsynth/src/midi/fluid_midi.c
index c1571006..9ae332d2 100644
--- a/fluidsynth/src/midi/fluid_midi.c
+++ b/fluidsynth/src/midi/fluid_midi.c
@@ -479,7 +479,7 @@ fluid_midi_file_read_event(fluid_midi_file *mf, fluid_track_t *track)
 
     mf->running_status = status;
 
-    if ((status == MIDI_SYSEX)) { /* system exclusif */
+    if (status == MIDI_SYSEX) { /* system exclusif */
         /* read the length of the message */
         if (fluid_midi_file_read_varlen(mf) != FLUID_OK) {
             return FLUID_FAILED;
diff --git a/fluidsynth/src/rvoice/fluid_iir_filter.c b/fluidsynth/src/rvoice/fluid_iir_filter.c
index 5b474692..d81ca582 100644
--- a/fluidsynth/src/rvoice/fluid_iir_filter.c
+++ b/fluidsynth/src/rvoice/fluid_iir_filter.c
@@ -281,7 +281,7 @@ void fluid_iir_filter_calc(fluid_iir_filter_t* iir_filter,
     fres = 5;
 
   /* if filter enabled and there is a significant frequency change.. */
-  if ((abs (fres - iir_filter->last_fres) > 0.01))
+  if (fabs (fres - iir_filter->last_fres) > 0.01)
   {
    /* The filter coefficients have to be recalculated (filter
     * parameters have changed). Recalculation for various reasons is
diff --git a/fluidsynth/src/sfloader/fluid_defsfont.c b/fluidsynth/src/sfloader/fluid_defsfont.c
index 3eea95cc..2bb45a48 100644
--- a/fluidsynth/src/sfloader/fluid_defsfont.c
+++ b/fluidsynth/src/sfloader/fluid_defsfont.c
@@ -1039,7 +1039,7 @@ fluid_defpreset_import_sfont(fluid_defpreset_t* preset,
   fluid_preset_zone_t* zone;
   int count;
   char zone_name[256];
-  if ((sfpreset->name != NULL) && (FLUID_STRLEN(sfpreset->name) > 0)) {
+  if (FLUID_STRLEN(sfpreset->name) > 0) {
     FLUID_STRCPY(preset->name, sfpreset->name);
   } else {
     FLUID_SPRINTF(preset->name, "Bank%d,Preset%d", sfpreset->bank, sfpreset->prenum);
@@ -1440,7 +1440,7 @@ fluid_inst_import_sfont(fluid_inst_t* inst, SFInst *sfinst, fluid_defsfont_t* sf
   int count;
 
   p = sfinst->zone;
-  if ((sfinst->name != NULL) && (FLUID_STRLEN(sfinst->name) > 0)) {
+  if (FLUID_STRLEN(sfinst->name) > 0) {
     FLUID_STRCPY(inst->name, sfinst->name);
   } else {
     FLUID_STRCPY(inst->name, "<untitled>");
diff --git a/fluidsynth/src/utils/fluid_sys.c b/fluidsynth/src/utils/fluid_sys.c
index ee7d8d92..3daa4c68 100644
--- a/fluidsynth/src/utils/fluid_sys.c
+++ b/fluidsynth/src/utils/fluid_sys.c
@@ -888,7 +888,7 @@ fluid_istream_gets (fluid_istream_t in, char* buf, int len)
       return 0;
     }
 
-    if ((c == '\n'))
+    if (c == '\n')
     {
       *buf++ = 0;
       return 1;